Earth is rotating at constant speed, and everything on it, including me, move along with earth at the same speed.
Suppose, I 'jump' from the ground, then the PHYSICAL CONTACT between me and the earth vanishes....... so in such a case, I should not be carried away along with the earth's speed in its direction in the few seconds of time while I am 'flying' in air. So, the ground below my feet should move ahead of me in its speed!!!!
Why it didn't happen?? :banghead: Never got a convincing answer, I look forward for my learned friends to throw some light on it.
The answer lies in your statement itself. " Earth is rotating at constant speed, and everything on it, including me, move along with earth at the same speed."
When you jump in the air for a few seconds you also have the same speed as that of the earth. So the relative speeds between you and earth both cancel out and hence you land at the same place.
Another example:
Imagine you are in a commercial airplane and travelling mid air. You thro a ball in the air. Does the ball land at your seat or a few seats behind? :) It lands at your seat itself because the ball also has the same relative sped as that of the plane and yourself.
ah! where is my torch
joking....
Just imagine u in a heli hovering in in a same position above 10 mtrs and at still place for ur answers
jumping for 2-3 seconds will not help .Jump for at least 2 hours to see the difference.
be a superman.
Exactly, so hovering in Heli will help me??? >:D.... say for 2 hours at same place ? will earth slip below me ???
Definitely it will .practically set a point on earth and then hover....the position will be changed
This is due to Newton's first law of motion stating 'A body in motion remains in motion unless external force acts on it and brings it to rest'.
You were rotating with earth at 1674.4 km/h and so was air around you. When you jump, the amount of retardation force excreted on you by the surrounding air is so less that you continue to rotate with the earth with (almost) same speed. Adding to it, the Earth's gravitational force (towards the center) also keeps you 'Attached' to its own rotational speed
You can draw an parallel by sitting in a car/bus whose all windows are closed and is travelling at 100km/hr. Now bounce a ball from your hand. Does the ball hit your chest at 100KM/hr ? No because the Ball remains to travel with the car at 100/Km Hr. But if you suddenly break, things changes ?
If you you still don't understand it, give me the number of your Physics teacher!
Quote from: ujjwaana on June 02, 2011, 12:31:04 PM
If you you still don't understand it, give me the number of your Physics teacher!
:giggle: :giggle: :giggle:
:giggle: :bow:.......My Physics teacher went insane long back.........with my questions.... :-\...
Any ways wot you said is right and great
wot if I start dragging myself in the opposite direction of earth's rotation :headscratch:...so I guess it will be impossible for me to move :headscratch:....
Forgot Jumping.......now I am in a Heli hovering above the surface!!!!!! now please answer!!!!
Do a Google on the Foucault Pendulum and read up..................
Ur questions are really...............:)
size of human is nothing when compared to earth .
demo
imagine u or me whatever u like;) (my height is size of radius of earth or simply moon gaint) and i am running on earth .So i will have to struggle against its motion but it is not applicable for a normal human being.
dat was a nice punch ujwanna sir :giggle:
VC sir I am reading.......
@Snehal: Lets build a huge, reallly huge vassel which can fly ( i know noting can compare earth's size) but much much bigger than human.....will it be possible to move without moving and by just lifting it above the earth's surface!!??
If it will happen it will solve lot of transport problems :giggle:....
I was unable to understand.move what and without moving what?? and are u lifting that vessel or its flying with its own energy like a heli or plane.
:salute: If you could drop a golf ball from the empire state building with no wind it would land nearly 5 inch of the true vertical due to rotation of the Earth. thank you VC sir
See this http://www.calacademy.org/products/pendulum/page12.htm
Yeah so it prove that earth moves ahead when u are in air :bow: :bow:
AM i right ?
I am learning to from these ...the website you posted is nice one thanks.
Kya koi aisa building India me banega jo world highest ho ya ........... underground?
i wish if aisa hota.
At present which is the highest building of India?
Somehow I seem to love this thread ! :thumbsup:
Me too.Nothing beats discussion about scientific facts and phenmenon.
Thanks Anwar Bhai.
It's a question haunting me from Childhood (I am sure to many others also ) and if we have an answer for it....what's the best use of this knowledge we can make ?
But still I am searching for a most convincing answer :bow:.........
Quote from: asinghatiya on June 02, 2011, 12:09:57 PM
Earth is rotating at constant speed, and everything on it, including me, move along with earth at the same speed.
Suppose, I 'jump' from the ground, then the PHYSICAL CONTACT between me and the earth vanishes....... so in such a case, I should not be carried away along with the earth's speed in its direction in the few seconds of time while I am 'flying' in air. So, the ground below my feet should move ahead of me in its speed!!!!
Why it didn't happen?? :banghead: Never got a convincing answer, I look forward for my learned friends to throw some light on it.
There is something called GRAVITY discovered by a gentleman named Newton years ago. No matter how high you are... as long as you are within the influence of gravity you will be pulled along with it. Its like an invisible metal rod glued between you and the center of the earth. If you want to move you have to do work (kind of ) against gravity.. thatz where the propeller helps.
OTOH, if you really want to move by just jumping high.. you have to jump high enough so that you move away from the influence of gravity. Thats where the satillites orbit the earth. You may probably need some super charged rocket shoes and other gear for this. ;D ;D... remember geostationary satillites are also moving along with the earth speed of rotation and they do have thrusters to do the job... However, high up there at inter-stelar space you don't need much of a thrust as air-friction/drag is not there.
On a similar note, imagine what you happen if the earth suddenly stops rotation... Should we all be thrown out of the surface??.. Or what would happen if the sun suddenly disappers??.. these are some interesting questions and they do have confliciting answers between Newtonian physics and Quantum physics.
Does anybody know why the earth rotates and the involvement of Law Of conservation of angular momentum?Further can anybody explain why tides or waves occur?
For @ post 1.
Looks like you never paid attention in your physics class while at School ;D
@flyingboxcar ;D .
@kartik
http://www.physicsforums.com/showthread.php?t=139986
http://in.answers.yahoo.com/question/index?qid=20070722214828AAfgb6j
Our earth rotation speed was not that high as it is now it was hit hard by a celestial object which resulted in more rotational speed .(Saw in discovery)
What is your favorite show on discovery or similar channels?
mine is nat Geo's i didnt know that.Those two doctors are really very funny.
second
is Future weapons ,got bored from Man vs wild coz that thing will never happen in my lyf .Just a wastage of tym.Bear grill really has a strong heart and metabolism.He is a real sportsman.
:headscratch: is it a viable (financially) project to create a vassel which lift itself (like a Heli) at a place and wait there till earth rotate and when his desired location reached it land there ;D....
I have understood the gravity and other stuff but still this question is unanswered :banghead:
Quote from: asinghatiya on June 02, 2011, 02:30:32 PM
:headscratch: is it a viable (financially) project to create a vassel which lift itself (like a Heli) at a place and wait there till earth rotate and when his desired location reached it land there ;D....
I have understood the gravity and other stuff but still this question is unanswered :banghead:
:headscratch: :headscratch:... Which part of it do you have problem with? I think you have some other element in you question that is bothering you.. Let us know your complete thoughts.
Further, even if you create a large or small vessel you cannot do what you wanted with gravity.
-Ismail
snehal50samarpit-man i know the cause.....just wanted u people to be aware of it.its really very interesting to see such topics.I watch NatGEO HD and Diccovery HD.just love them!MEgastructures, amazing photos and yes i used to watch i didnt know that berfore..but dont see much of it now.and on dicovery and discovery HD there are really great documentaries.Man if u have full HD TV and HD transmission. do buy it.Purely recommended by me!Im damn sure u would stop watching all other channels!further if u want to really see some good stuff, see Ancient Aliens by NG.search Ancient ALiens on google and get it!
Their is one called airship (lighter than air vehicle ) amazing. Run on hydrogen or helium.
Only drawback for those is time.
But ur question is good.I am too confused that what is the need of aeroplanes when we can travel anywhere on earth within 24 hrs.
Maybe the wind is villain.
guys are we going to invent something? ;D
I think now I am getting it. Its not inertia nor the environment but the Gravity that is the culprit.
But then how Pendulam experiment is possible which is used to prove that earth is rotating?
Why the ball from Empire state building is falling 5 inch away from the exact vertical?
so can we outrightly reject the possibility of such an experiment ("large vessle......") ....?
BTW guys I miss air Crash Investigation on Net Geo :banghead:....but on You tube you can see full new episodes of it. :salute:
@Kartik
What i think is we should not watch those show which shows only birds,animal, are wastage of time.Some of the shows are interesting but what to do after u watched the film.What is the need of watching lions hunting ,birds catching their pray.one time is enough for me.
Also their is a show on Sir Steven hawkins .He is great person. But most of the tym he tells useless things like whats would happen if this alien does this,what will happen if this planet collides with this.i know those are interesting but instead watching those watch shows like "I didn't know that" and sometime time warp (not always) will give us some USEFUL knowledge and information which could be used by you in some circumstances.
but they come on NG HD(air crash investigations)
snehal50samarpit -u misunderstood my questiom.The Question is the cause of EArth's 'Rotation' and not 'Revolution'.i hope u'll understand the terms correctly.BTW link here..
http://askville.amazon.com/makes-Earth-spin-axis/AnswerViewer.do?requestId=1589098
Man are u sick?World is not only made of of machines!!damn it!these days humans are so narrow minded!!.U dont like birds, the greenery and evrethng?oh gosh its bcoz of people like u by which our earth is changing and yeah..concrete jungles too!change ur mind snehal!otherwise nature will take its own stuff!.nd i never meant watching animal stuff i said might ships, megastructures stuff like that!oops forgot time warp..its my fav!
:banghead: :banghead: dear freinds ... :salute:...please ..... ;D...we were discussing something elase... :bow:
Quote from: asinghatiya on June 02, 2011, 01:02:06 PM
:salute: If you could drop a golf ball from the empire state building with no wind it would land nearly 5 inch of the true vertical due to rotation of the Earth. thank you VC sir
See this http://www.calacademy.org/products/pendulum/page12.htm
Yeah so it prove that earth moves ahead when u are in air :bow: :bow:
AM i right ?
Assuming the theory is correct, would the ball not land 5" WEST ?
depends on u r point of view!
Quote from: asinghatiya on June 02, 2011, 02:58:43 PM
Why the ball from Empire state building is falling 5 inch away from the exact vertical?
Because when the ball is dropped first it continues to move with the building which is moving with the earth i.e ~1500 km/h. Now while the building continues to move speed of the ball decrees due to drag caused by air (air resistance) thats why it falls behind.
Also I think Izmile has already answered your question :headscratch:
@sunlikestar - I know y ball fall away !! actually I intend to say that, "yeah ball will deveate, because of earth's rotation.... than why not a big vessel in the air!!!!"
According to Izmile its not possibel due to gravity :)....
Quote from: kartikmadhira on June 02, 2011, 03:26:49 PM
depends on u r point of view!
It's not a "point of view". The earth rotates from West to East. So the earth will have moved East wards during the time the ball takes to reach the ground. The ball should therefore land to the West.
Maybe you should give Ujjwaana your number!
Quote from: asinghatiya on June 02, 2011, 03:35:15 PM
"yeah ball will deveate, because of earth's rotation.... than why not a big vessel in the air!!!!"
According to Izmile its not possibel due to gravity :)....
Oh, well I think, we'll wait for Izmile to answer this.
In the mean time I just want to clarify one perspective, the ball doesn't deviate because of earth's rotation, it deviate because of friction with air. Earths rotation wants to keeps the ball moving (not letting it deviate) but air resistance causes the ball to loose its inertia.
Chill man.draw imaginary axes in all directions of the bulding.think on the first quadrant and the
4th quadrant in any north direction.i hope u'll understand!
@sunlikestar-man it is given that the air resistance is zero!
Actually the condition given there is "no air" when ball is falling :).... so I guess he is talking about an ideal Vacuume condition, hence no friction!!!
Even in that case Gravity will be acting !!!!
@asinghatiya...xactly as i said!but i said it first.. :giggle:
Yep gravity will be actiing But dont forget your friend inertia :) with the ball keeping its inertia it will keep moving with the building and you'll see no deviation.
:headscratch: sir thats wot this experiment says....that it will deviate in vacuume!!!!!
No it doesn't!
Quote from: asinghatiya on June 02, 2011, 02:30:32 PM
:headscratch: is it a viable (financially) project to create a vassel which lift itself (like a Heli) at a place and wait there till earth rotate and when his desired location reached it land there ;D....
Quote from: snehal50samarpit on June 02, 2011, 02:58:11 PM
But ur question is good.I am too confused that what is the need of aeroplanes when we can travel anywhere on earth within 24 hrs. Maybe the wind is villain.
both of u. Yes it can be done. if u have money but u can only travel along the same circle i. e east to west. why would one want to travel in same direction always?
(http://upload.wikimedia.org/wikipedia/commons/thumb/3/30/Globespin.gif/220px-Globespin.gif)
there is so much to write for all the question above but i am busy in office. maybe later.
snehal50 one question for u. If the Earth stopped rotating, would time stand still?
:bow: Good to hear from you....atleast one who think alike :thumbsup:.......
BTW good question to snehal50 :giggle:,,,he need to spent his today's night to answer this.......
I am also in office .... :'(....so much of workload.... :P.....but cant stop myself....everytime i see blinking red light on my blackberry...wihtout seeing it...I know I got a reply on RC india :)
Quote from: asinghatiya on June 02, 2011, 03:35:15 PM
@sunlikestar - I know y ball fall away !! actually I intend to say that, "yeah ball will deveate, because of earth's rotation.... than why not a big vessel in the air!!!!"
According to Izmile its not possibel due to gravity :)....
@asingh,
If you perform the experiment in vaccum, the ball would hit dead center.. SLS is right, the ball's inertia, and the gravity will keep it on track to the center. The Focault's pendulum will have deflection only when the oscillation is there.. If its allowed to stand still it will be pointing to its center. The case of a free falling ball in vaccum is more like a focult's pendulum standing still.
Remember, the Newton's first law. - Every object stays in the constant state of rest or of uniform motion, unless an external force acts on it... So, in vaccum, the external forces are eliminated and the forces acting on the ball are earth's gravity and earth's angular rotation force. These two forces will lead the ball to the center point.
Nevertheless, you would not get too far with this concept and it may not be appropriate to travel long distances. But is a very nice topic though.
-Ismail
:bow: Agreed Izmile....thank you..... .....lot of learning for me. I look forward for more prespectives on this ..... :thumbsup:
Quote from: CrazyPilot on June 02, 2011, 04:05:41 PM
If the Earth stopped rotating, would time stand still?
That is yet another interesting question...
:bow:.....time is compartmentalization of universal events happening around us.
If no day and night then we will use some different reference :thumbsup:......like...........!!!!!!any thoughts............. :headscratch: :headscratch:
If we are really going to discuss time, then this thread can get very messy :P (:|~
Yea.. bring it on.. I know where this would lead us to!.. ;D ;D... but anything for science..
I absolutely love this thread.I'm into Physics but can't answer for some reason. :D
As SLS has said,time will make this a VERY messy thread.
{:)} I am pleased to see the response :salute:....
When are discussing gravity, momentum and intertia....Time anyways become an integral part of it..... so ..... :thumbsup: lets put some thoughts about time too.......
Ok.. just to kick start it..
Lets say we have two perfectly matched atomic clock... ticking in perfect resonance. Note that these two clocks are at Earth. Now, if we transport one of this clock to the moon.. Do you think the clock will still run perfectly matched?
No
The clock on the moon will run slower due to the gravitational time dilation, lower the influence of gravity slower time passes :discuss:
To dial it a notch higher.
How much time will it take for you to travel to a star say five light years away if your space ship is traveling at the speed of light.
Assuming traveling at the speed of time is possible 8-)
SLS got it... but its the other way round. The clock on the moon will run faster due to lower gravity/mass of the moon.
I wonder how gravity or the mass of an object influences time.
The GPS satilites have clocks compensated so that it matches with the time on the surface of the earth.. without the time compenstation there will be like 4 (or 6??) miles cumulative difference in the GPS location you wish to go.. Isn't physics interesting?
Do post some weird questions.. I am sure there are lot more members here with such questions.
Oh yes, its the other way round.
About the GPS satilites, wont that be due to dilation due to relative velocity or may be both :headscratch:
ps: see my question posted above your response :salute:
Quote from: SunLikeStar on June 02, 2011, 05:16:59 PM
The clock on the moon will run slower due to the gravitational time dilation, lower the influence of gravity slower time passes :discuss:
That is wrong. Greater the influence of gravity slower the time. Time nearly stops near a blackhole. Thats the theory
Quote from: SunLikeStar on June 02, 2011, 05:22:28 PM
To dial it a notch higher.
How much time will it take for you to travel to a star say five light years away if your space ship is traveling at the speed of light.
Assuming traveling at the speed of time is possible 8-)
5 years.
There are more questions with baffling answers.. I have a few..
1, Why are planets spherical in shape.. why not a cube?
2, This may be a bit too much... but just for our imaginative minds : What is infinity?... there a quite a handful of mathematicans who have gone mad thinking about it.... see the documentry named - "Dangerous Knowledge" in youtube.
3, This is another thing I could not explain to myself.. Why do we need earth connection for mains power supply.. I know its for saftey but if we do not earth the neutral line at the power plant we will not get a shock.. unless we touch both the conductors (line and neutral)... A good professor of mine once convienced me but I kind of forgot what he said over time.
4, Now, something on airplanes... If you see videos of sonic boon created by aircrafts.. you would see the plane moving at a speed which is not too high compared to some RC airplanes.. but still it manages to create a sonic wake.. I have seen RC planes doing much higher speeds (for my eyes) but they don't make sonic wake.. What deceives our (my) eyes??
-Ismail
Quote from: SunLikeStar on June 02, 2011, 05:22:28 PM
To dial it a notch higher.
How much time will it take for you to travel to a star say five light years away if your space ship is traveling at the speed of light.
Assuming traveling at the speed of time is possible 8-)
Most stars that we look at night sky are millions, if not, billions of light years away.. So, the light that you see from the star today have started their journey millions of years before.. May be even before the evolution of man or existance of life... It could be that a star that we see today has already died and we are just seeing the light it had produced when it was alive...
Everything and i mean everything is related to time even the answer to the first post is about time. IF asinghatiya makes a hovering vessel (which is not affected by any outer force) and wait 24 hours he will be at same place again. so its all about time.
Quote from: SunLikeStar on June 02, 2011, 05:22:28 PM
To dial it a notch higher.
How much time will it take for you to travel to a star say five light years away if your space ship is traveling at the speed of light.
Assuming traveling at the speed of time is possible 8-)
Please do not even assume as one can not travel at speed of light because of time constraint. all kinds matter & energy etc etc. known to man will cease to exist before reaching at c. in other words only light can travel at c. if someone reaches at c or beyond, he can time travel ( one way only no going back). so in the end everything is related to time.
Another interesting question that my brother asked...
Imagine you are inside a car running at 60Km/hr... there is a bug inside the car and it flew from the rear window to the wind screen.. Lets say the bug's forward speed is 3Km/hr.. So, does it mean that the bug has flown faster than the car (@63Km/hr)? Can it do 63Km/hr outside the car?
Quote from: kartikmadhira on June 02, 2011, 03:13:24 PM
Man are u sick?World is not only made of of machines!!damn it!these days humans are so narrow minded!!.U dont like birds, the greenery and evrethng?oh gosh its bcoz of people like u by which our earth is changing and yeah..concrete jungles too!change ur mind snehal!otherwise nature will take its own stuff!.nd i never meant watching animal stuff i said might ships, megastructures stuff like that!oops forgot time warp..its my fav!
@ kartik .U misunderstood i am not telling that don't love nature ,don't interact with them,dont watch shows regarding it.But don't forget that u cant live without science too .U have to interact nature as well as science so that you could live a better life.If you are so concerned about nature then for god sake dont watch Tv,Don't drink cold water from refrigerators ,don't run your pulsar bikes,take some action regarding it,plant trees.
If you do all these then you don't have the right to say that.
In this 21th century u need both nature and science TO LIVE.
So now next we come to watching shows. Lets take an example .
Suppose there is a show telling us what to do when snake bikes or people are sharing their experiences of snake bites. So i watched that show and i know how to save myself.And you watched alien stuff and mega structures(suppose .... dont take it wrong) then you wont be able to do so.
Actually... different views of different person.BUT U CANT PROVE ME WRONG.If yes then tell me.....
Yes it is true that watching things that we have never seen before is interesting .dat again depends on u and ur interest.I have no objection.And i also dont have the right to say that yes dont watch that show.But yes the thing u said of sickness....u can guess it urself
Quote from: izmile on June 02, 2011, 07:08:30 PM
Most stars that we look at night sky are millions, if not, billions of light years away..
Alpha centauri is ~4.5 light years away from us.
Quote from: izmile on June 02, 2011, 07:04:22 PM
5 years.
The journey would be instantaneousness and will take no time. There is a very nice thread about this on the physics forum (http://www.physicsforums.com/showthread.php?t=235132).
Quote from: CrazyPilot on June 02, 2011, 07:15:04 PM
one can not travel at speed of light because of time constraint.
PS- Lets waste some more time reading this thread.
:banghead: I said assume. And I did not understand you PS note, can you please elaborate ???
Quote from: izmile on June 02, 2011, 07:39:57 PM
Imagine you are inside a car running at 60Km/hr... there is a bug inside the car and it flew from the rear window to the wind screen.. Lets say the bug's forward speed is 3Km/hr.. So, does it mean that the bug has flown faster than the car (@63Km/hr)? Can it do 63Km/hr outside the car?
For the observer inside the car the bugs speed is 3Km/hr and for the observer outside the car the bugs speed is 63km/hr. Speed is perceived because as time is relative speed is also relative.
Quote from: snehal50samarpit on June 02, 2011, 02:58:11 PM
Their is one called airship (lighter than air vehicle ) amazing. Run on hydrogen or helium.
Only drawback for those is time.
But ur question is good.I am too confused that what is the need of aeroplanes when we can travel anywhere on earth within 24 hrs.
Maybe the wind is villain.
guys are we going to invent something? ;D
yes snehal wind is the willion. Its not only the earth, but atmosphere too which moves along..
But its possible in space, just remember the geostationary satellites, which has to be mechanically given the initial momomentum, in direction of earth to focuss at same time on earth..,
if not, it will see the whole world within 24 hrs as you said ;D
Quote from: izmile on June 02, 2011, 07:39:57 PM
Another interesting question that my brother asked...
Imagine you are inside a car running at 60Km/hr... there is a bug inside the car and it flew from the rear window to the wind screen.. Lets say the bug's forward speed is 3Km/hr.. So, does it mean that the bug has flown faster than the car (@63Km/hr)? Can it do 63Km/hr outside the car?
Well, the orbital speed of the earth averages about 29.8 km/s (107000 km/h). So, if one moves at 3 km/h it doesn't mean they're moving at 107003 km/h, it's all about relative velocity. When the bug is on the rear window of a car moving at 60 km/h, it too has a speed of 60 km/h and a momentum because of that speed which it can use to go to the front pane.
Again, if it hovers for too long, it will gain a relative speed w.r.t the car. This case is similar to the one in the first post.
Quote from: izmile on June 02, 2011, 07:39:57 PM
... Can it do 63Km/hr outside the car?
No, not even if the bug in question is a 'dragonfly' (which are the fastest and have been clocked at a speed of 35 miles an hour) ;) ;D
Quote from: SunLikeStar on June 02, 2011, 09:15:22 PM
The journey would be instantaneousness and will take no time. There is a very nice thread about this on the physics forum (http://www.physicsforums.com/showthread.php?t=235132).
Yes. You are right. For the traveller it would be almost instantaneous because time slows down at the speed of light.. but for the observer in earth it would be 5 years.
I could not find convincing answer of Time stopping or going back to past... that would create a lot of unexplainable paradoxes.
Quote from: Swapnil on June 02, 2011, 09:42:51 PM
Again, if it hovers for too long, it will gain a relative speed w.r.t the car. This case is similar to the one in the first post.
Even if it hovers for a long time, it will still fly at 60Km/hr (for the observer outside)... This is because the air column inside the car is also moving at 60Km/hr and it carries the bug forward and it dosen't need to flap its wing harder than just hovering outside the car.
Quote from: izmile on June 02, 2011, 10:47:56 PM
I could not find convincing answer of Time stopping or going back to past... that would create a lot of unexplainable paradoxes.
Actually majority of physicists (including Steven Hawking) believe that travelling to the past is impossible. The theory is still based on lots of assumption, while travel to the future via time dilation has been proved, like the atomic clock experiment you pointed out earlier.
Quote from: asinghatiya on June 02, 2011, 04:11:24 PM
BTW good question to snehal50 :giggle:,,,he need to spent his today's night to answer this.......
Man Yes u were right it took me night to think about it at my level.
Quote from: CrazyPilot on June 02, 2011, 02:58:11 PM
snehal50 one question for u. If the Earth stopped rotating, would time stand still?
Sir currently I am studying in +2 and I am not expert on this and also not good in physics ..here is the answer of my level and maybe it is wrong.
If the Earth will stop its motion then that means half the night and half the day always.
We measure tym by rotation of Earth and not by clock. Ghari ek jariya hai tym btane ka . If not so ,I would have taken out batteries of clock ;)
If earth stops then yes time stops for us coz w say that time is passing by when we see position of earth related to sun or moon or other stars .So I will say Time Stops For Me and not for aliens when Earth stops its motion coz this is night or day for me .
But there is no use of saying that coz Earth will never stop!!
Even if Earth stops its environment will be in motion (Sir Newton's law) and it will take away everything with it and no life will sustain.(Suppose we are Siting in a car at 1000 km/hr speed .we will be comfortable in that speed also But if suddenly car stops then we will be thrown out .(Maybe car phaar ke bahar nikal jaye.) ;D
In this case car is our environment and we are its inhabitants and in large view all the topmost surface of Earth ,layers of Earth and all its inhabitant (including us) are its inhabitants and environment is our environment.So life will end within one sec.
I am wrong then please correct me.
Another thing related time is related to BLACK HOLE .accding to scientist we know that black hole is nothing but dark energy which pulls everything inside it and time in there slows in real (imagine it takes ½ an hour for a pen to fall from our hand).
That is another tym and another wrld. Scientist also say that we can travel in future wid the help of black holeand also travel backwards.But I am unable to understand that hows is dat possible?
When an object falls in a black hplrr o o soruy 30 sec left at café .wil continu nxt tym sory.
This is a reasonable question. I had a question inn Time travel . my question was " Consider that we are launching a space shuttle that travels to the speed of light. Then by Time Dilation, time inside the space ship will be longer than that of ground station.Won't it cause a disturbance in their communication? For eg. If the space shuttle travels for a day,it would be just a day inside the space shuttle but in the ground station it might be a couple of months. That brings out a confusion between the shuttle crew and ground crew. Is this possible or not?"
I had contacted NASA and got answer for that.The answer was relevant.
"hanks for your question. Yes, you are correct that communications would be very difficult!
First, I should point out that the space ship could never quite reach the speed of light. According to Special Relativity the total energy of an object increases as its speed increases and approaches infinity as the object's speed approaches the speed of light. This means that it would take an infinite amount of energy to accelerate an object to the speed of light.
So, we'll assume the space shuttle is traveling away from Earth at near the speed of light. From the perspective of the ground station on Earth, time would appear to pass more slowly on the space shuttle. Their radio signal still reaches us at the speed of light (albeit with a doppler shifted frequency) but we perceive their transmissions to lengthen.
But what about the signal we send to the space shuttle? From their reference it is the ground station that is traveling away at nearly the speed of light. So they record the signal from the ground station slowing down! Both communications are slowed down relative to the perspective of those who are receiving them.
How is it that both clocks slow down? This is the "Twin Paradox" (explained here: http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970701a2.html). If at some point the space shuttle were to return to Earth to compare communications with the ground station, then they would change their inertial reference frame (ie, change course). This requires an acceleration that leads to its own effect on how communications are perceived by the observers on both the shuttle and ground station. It's during this acceleration that General Relativity come into play, causing the total time experience by the shuttle to be less than that on the ground station (assuming it's the shuttle that changes course).
This isn't just a thought experiment. GPS satellite signals need to take into account the relativistic effects to correctly determine positions, as explained in detail here:
http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html
In short, the orbital velocity has the effect of making the GPS clock tick slower (relative to us). But there is also a much stronger General relativistic effect from the GPS satellite being higher in the Earth's gravitational potential than us on the ground, that makes the GPS clock appear to tick much faster. The net effect is that the GPS satellite clocks appear to tick faster than our ground clocks (but both are important)."
You can contact and ask your question here: http://imagine.gsfc.nasa.gov/docs/ask_astro/ask_an_astronomer.html
Quote from: snehal50samarpit on June 03, 2011, 10:29:42 AM
Sir currently I am studying in +2 and I am not expert on this and also not good in physics ..here is the answer of my level and maybe it is wrong.
Boss, I already knew that u were a school boy and i asked that question just for fun. i dint want u to answer that. Its only that there are infinite more questions like this and nobody can answer them in their lifetime. so chill and happy flying.
NO sir don't call me BOSS ;D .I am a cool dude 8) .I don't take anything by heart . :)
Actually when u asked that question I really found myself unable to answer that one.So i took it as a challenge (challenge to me only ,speaking to myself that "what is this snehal u are in +2 and and u r not able to answer even this easy question) .So i got inspired from this and tried to find out the answer
at my level which even may be wrong.
Actually i am grateful to you coz u asked me dat question and i learned from it.
and i said i am currently in +2 so that even if my answer is wrong you can understand my level and correct it.
i can't always be right
u can't always be right
every person on this earth can't always be right.
But yes we learn things from our mistakes and also from forum like RCINDIA.ORG. ;D
Thnks
S.S.
ok S.S. try to answer these.
How far east can you go before you're heading west? :headscratch:
If the universe is expanding, what is it expanding into? ( i feel Georg Cantor was right) :headscratch:
If you have x-ray vision, and you can see through anything, wouldn't you see through everything and actually see nothing? :headscratch:
Now sir dats not fair. :) .Dekhiye ab aap mujhko phasa rahe hai. ;D
but i will try to answer these -
1st Greenwich prime Mediterranean line decides that.(i read bout it in class 6 or 7 so i think i forgot the answer)
I am confused its wrong.
2nd out of my syllabus and also i really dont know .But i am interested to know it.
3rd Cray cannot penetrate though evry objects in this world. X-ray spectrum can only pass through some object like muscle,flesh and not object like bone.i exactly dont know how to differentiate.
Raising hand in class for a question is better than remaining quit in one corner. :)
{:)} :salute: this is awesome, believe me after so many years now it become clear to me that Wot does it mean when we say Time stops when we travel with speed of light. This is known to me from ages(I guess to all ) but I understood this concept now :o....
I hope it helped many of us in understanding many important concepts of physics.
This is the power of collective wisdom....:salute:
I have got a bio question.
accidently i touched a lizard in my house and after it, the tail of the lizard fell down .eeehh.
but the tail kept on moving like hell.
So my question is why that happened even if the tail was detached form the main body.??
This is called 'surviving technique' reflex action.
It is an important surviving technique and defense mechanism- lizards drop their tail to redirect the predator's attention and find a way to escape!
The reflex muscle movement is commanded by the brain, and so it wiggles! Smart lizards! lol 8)
It happens with every living organism! Check 'slaughter' videos on YouTUBE! You'll get a better idea- also get along a bucket to vomit after watching!
eeeeeeeeeeee................. but that SLIMY thing is REALLY UGLY!!!!!
Gosh! How can you touch a LIZARD??????????????? :o
Good, one more learning :)
@ globalmind.
Actually i thought that there was some dirt or something like that .I went to swap it immidietly but ooohh my god ..eeeh ..after i touched it, it was n english lizard ( coz it was beautiful white lizard).It went away but left its wobbling tail.Actually i began to love lizards after watching shows on natgeo and discovery.Yeah they are beautiful creatures but they should not fall on somebody withot asking that should i land on you.happened with me 4-5 times.
I want to know when the tail was detached how can the brain give it commands.Its not like Tx giving command to the servos for the movement wih 2.4 ghz frequency.
So is their any wave ?(offcource not).what makes the tail move??Is there any potential energy stored in it?
Quote from: snehal50samarpit on June 11, 2011, 10:13:35 AM
I want to know when the tail was detached how can the brain give it commands.Its not like Tx giving command to the servos for the movement wih 2.4 ghz frequency.
So is their any wave ?(offcource not).what makes the tail move??Is there any potential energy stored in it?
Tail shedding is called autotomy and the movement is called modulated motor control. its like the tail having a mind of its own. Autotomy is the process by which an appendage is voluntarily shed from the body of an animal and has arisen independently many times. It occurs in reptiles, amphibians, mammals and many groups of invertebrates. It distracts predators during predator–prey interactions by providing a visual stimulus that entices the predator to attack the tail rather than the lizard. In addition, tail loss can significantly increase the running speed, which also enhances the ability of a lizard to escape a predator. Whereas tail loss is beneficial to the lizard in terms of acute survival, several costs are also incurred. For example, tails are very important for jumping, mid-air maneuvers (think of a Rudder) and for support while climbing. I hope this info helps. Thx
A link to add to your, interesting, info:
http://www.ncbi.nlm.nih.gov/pubmed/19740891
Thx for the link. Maybe he wanted an answer here instead of googling himself.
@crazyPilot Thnks sir that was the term and answer i wanted.
@thanks sushil sir for the link.it was really helpfull.
I googled it but was unable to find those .Thnks again.
On a similar note, in vertebral animals (including humans) the spinal cord has rich set of nerve cells that could make decisions instead of relaying information to the brain. Some of the involuntary actions like reflexes, reaction to pain will be dealt by the spinal cord.
Further, I think the local nerve cells also react to pain as well. Sorry to sound gory but I have seen meat pieces shiver after a sheep has been freshly slaughtered...
Hey, I have another way to tell:
(Probably the MOST WEIRD)
Why Lizards drop tail- This happens usually with lizards having 30A ESC. The tail has a motor wires, the lizard during emergency shuts off the throttle and the current flowing in the motor via ESC rotates till the final current is cut! This causes the tail to move.
Bigger lizards with 5000mAh 3S have lesser response to tail movement. But if you short the terminals by putting your finger in between the jaws of lizard, you will get a freaky feel!
Smaller lizards with 1800kv have more speed in both tail and body, whereas bigger lizards with 1200kv have more power to run longer, but slower speed- we can say them as SLOW LIZARDS! :thumbsup:
Slow lizards are usually not found, these days all lizards are using ZIPPY 2200mAh 3S 25C for better thrust and run! And lizards always prefer ZIPPY because they are good in hiding, they ZIP themselves in corners! LOL
Glow lizards are hard to find!
All lizards are 6 channels equipped!
These lizards are brushless! Have a look at the pic, sorry for bad art! ;D ;D
:headscratch:
Milind, I think you are kind of obsessed with electric power system.. ;D
Wouldn't a brushless lizard have really nasty black smelly teeth/mouth ? :headscratch: Unless of course, it has access to Listerine :rofl:
PS: Sorry, but I really really felt the sudden urge to use that ROFL smiley !
Yes Izmile!!!! I am really obsessed with electronics and drums since I was in class III ;)
I took countless participation all around and made whole lots of models, robo-designs, etc..etc....
I wish if I can show you my room- stuffed with these things!!!!!
@Anwar: LOL LOL LOL Listerine!!!!!!! ;D ;D
Quote from: globalmilind on June 11, 2011, 02:02:28 PM
Hey, I have another way to tell:
(Probably the MOST WEIRD)
...
...
These lizards are brushless! Have a look at the pic, sorry for bad art! ;D ;D
I got a charge out of this (actually for free)! And thereby hangs a tail ;D
HI guys,:) anybody know the trick for putting your hand palm on fire or burning candle without harming . Any solution??
hands should be bare.