Physics - June 2006

Some time ago I asked if there was a long pole between 2 stars, and somehow I managed to pull on one end, would someone on the other star, say 3 light years away, feel it pull at the same time? Or would they have to wait a few years?
Someone said no because of 'rigidity' and the speed at which waves of atoms pull on each other. Nothing pulls instantaneously.
Ok, therefore if you was in the middle of the two stars and you was pulling the pole backwards and forwards from the middle, the pole atoms would surely be compressing on one side of your hand, and expanding on the other side (before the pole is seen to move). Is there a formulae to work out how far the atoms in a pole (for example) would compress or expand before there is movement? Putting it another way, suppose you was pushing or pulling a 20cm long pencil (say in a vacuum without gravity to remove effects of resistance), whats the formuale to work out how long it would take for it to move, after the initial push or pull?

2006-06-21 09:14:23 · 3 answers · asked by liquid_ice_71 2

just a simple physics question, what part of an amplifier is the most important and why, too lazy to research, doing a homework for a friend so hey, why not use yahoo answers and let the wonderful nice people that are bored to death answer it ha?

2006-06-21 08:39:31 · 5 answers · asked by lj 1

Assuming that it survives re-entry, how big a crator would a human leave when it impacted with Earth?

I'm not that morbid - it's just a story I'm working on.

2006-06-21 08:02:15 · 8 answers · asked by Ste 2

2006-06-21 07:52:25 · 3 answers · asked by Anonymous

The sound level close to a jet (r =1m) when it takes off is about 150 phon. How far do you have to go away in order to lower the intensity level below the pain threshold?

2006-06-21 07:38:57 · 2 answers · asked by Stavi 2

time and space is made up of. Its all around every step you take you walking into something what is that something.??? a site is what i am realy looking for!>>?

2006-06-21 07:32:39 · 8 answers · asked by Anonymous

A man is hovering over a pit and a boy falls past with terminal velocity. The frequency of the boy's scream decreases from 842Hz to 820Hz. (a) Find the speed of descent of the boy.
(b) The boy's scream reflects from the bottom of the pit. Find the frequency of the echo as heard by the boy.
(c) Find the frequency of the boy as heard by the man?
Please I would like an explicit approach. Thanks.

2006-06-21 07:29:35 · 4 answers · asked by Stavi 2

Is fate the illusive 'God'? And, Is there a universal Gaea? (mother universe) Also, Is the Selfish Gene the precursor for future events?

2006-06-21 07:28:58 · 7 answers · asked by anthonyasm123 1

2006-06-21 06:51:04 · 14 answers · asked by wkndwrer530042 1

2006-06-21 06:50:28 · 13 answers · asked by seferitanner 4

2006-06-21 06:38:43 · 12 answers · asked by anthonyasm123 1

Also, in light of the Newton's laws of motion, how is it that you can be coasting in one direction, turn the wheels of the car and then be going in exactly the opposite direction without even running the engine? Does this contradict the laws of motion?

2006-06-21 06:36:21 · 12 answers · asked by The Mog 3

because i know ds/dt = v and dv/dt = a, so what does da/dt = ???
or the gradient of each graph to everyone else
Is it just something of no significance?

sorry didnt know whether to put this in physics or maths.

2006-06-21 06:23:09 · 4 answers · asked by Anonymous

it is a fun question

2006-06-21 06:16:24 · 7 answers · asked by hobbbes72 2

a heat input of 800J for each 1000J of work output, design 2 a heat input of 2500J, and design 3 a heat input of 3500J. Which design would you choose and why?

2006-06-21 06:07:50 · 5 answers · asked by jlynn 1

Photon's of energy 6eV cause electrons to be emmmited from a certain metal with a 4eV work-function. If 3eV photons are indident on this metal which one of the following statements is true?

-No electrons will be emitted
-Electrons will be emitted with a maxium kinetic energy of 1eV
-Electrons will be emitted with a maxium kinetic energy of 7eV
-Electrons will be emitted with a maxium kinetic energy of 12eV
-Electrons will be emitted with a maxium kinetic energy of 0.75eV

2006-06-21 06:05:42 · 4 answers · asked by Anonymous

exhausts waste heat at 127 degrees C. How much work does it perform?

2006-06-21 06:02:40 · 3 answers · asked by jlynn 1

2006-06-21 06:01:32 · 6 answers · asked by Anonymous

2006-06-21 06:00:31 · 6 answers · asked by Enkay 1

can at 20 degrees C is thrown into a fire and is heated to 600 degrees C, how many times atmospheric pressure is the new pressure inside the can?

2006-06-21 05:59:45 · 5 answers · asked by jlynn 1

If the answer is yes, would the same rules apply to a fly (or a rock) hitting a train head on? If the rock (or bug) stops before reversing direction, doesn't that mean that the train stopped as well, even if only for an instant?

2006-06-21 05:51:54 · 24 answers · asked by paranormaldrone 1

2006-06-21 05:50:27 · 15 answers · asked by plasmaisnoturs 3

decreases? Why?

2006-06-21 05:48:53 · 4 answers · asked by smiley 1

2006-06-21 05:44:50 · 7 answers · asked by smiley 1

water at 50 degrees C or with a 1kg gold bar at 50 degress C? Why?

2006-06-21 05:43:38 · 10 answers · asked by smiley 1

impossible on the absolute scale?

2006-06-21 05:40:57 · 17 answers · asked by smiley 1

So many times I observed that places are not that much of beautiful when they observed , but their photographs are very beautiful.

2006-06-21 05:37:35 · 4 answers · asked by sara_swathi m 1

Actually when a fly is flying in moving train, it is not touching any part of the train. It is in the space within the train. So I think it is not having the speed of train. But its speed depends on the air within the train. Actually I am not in a position to axplain my doubt exactly. Please understand my doubt and try to answer.

2006-06-21 05:29:38 · 9 answers · asked by sara_swathi m 1

Can you please explain this to me either way... I don't really know.

2006-06-21 05:21:14 · 11 answers · asked by MeShell 2

velocity is relative so one person can go one mile faster than other person. If this is possible than second person can go 1 mile faster than first and so on. When we reach to 186001 th person, he will be travelling at more than speed of light with respect to 1st person. He cannot see 1st person but he is travelling faster than speed of light.

In the Universe there are many objects which are travelling away from us which may be nearing to the speed of light. If that is the case we can go in opposite direction to those objects and can go faster than speed of light.

When an object is travelling, why should it's speed be dependent on some observer which is not connected to object in any shape or form?

We cannot go past Speed of light only if the velocity is absolute and has no reference point but I dont think it is possible. Speed and velocity are not absolute as they have ref pt with respect to which we measure them.

2006-06-21 05:20:52 · 14 answers · asked by my_buddy007 2