2007-07-07 07:23:58 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
In order to answer your question a person needs to know why a field of gravity forms. First of all, Stephen Hawking in "A Brief History of Time," page 92, paragraph 3, states; "Like light, gravitational waves carry energy away from the objects that emit them." So, a field of gravity is a particular form of energy. This form of energy is described in the physics trilogy, which is: E = mc2, m = E/c2, and c2 = E/m. The "c^2" value of the last equation is that of a field of gravity or that of a field of time. It is an energy/mass relationship.
The form of energy spoken of in the equation is that of the heat energy contained within a mass. The greater the heat energy, the greater the field of gravity. Were a mass the size of our planet to have no heat energy within it, then it would have no field of gravity about it. Were the heat energy to increase, the force would increase.
Our sun expends 665 lbs/sec in order to keep the planets in place about it, and our planet expends 0.00444 kg/sec in order to keep us in place about it. There is an experiment that was performed a few weeks ago that proves a field of gravity is able to be formed and collapsed. It is found at http://youtube.com and the name of the experiment is "successful gravity experiment". It had to be posted in segments because of time restrictions, so it needs to be put back together.
2007-07-07 07:47:09 · answer #1 · answered by d_of_haven 2 · 0⤊ 1⤋
If you are asking about the propagation speed of gravity. It's still debated among scientists. The 1993 Nobel Prize in physics was awarded to a team who reached this conclusion based on astronomical observations. Watch for results from the LIGO (Laser Interferometer Gravitational-Wave Observatory) and LISA (Laser Interferometer Space Antenna) projects, and the work of Joseph Taylor and Russel Hulse at Princeton.
Gravitation is an extremely weak force, very hard to measure. It's hard to set up an experiment with changing gravitational fields. I wouldn't call it conclusive yet, but I think most physicists would place their bets that gravitation propagates at the speed of light.
If you clarify your question, the answer will probably be that we don't understand gravity well enough to answer.
2007-07-07 14:32:33 · answer #2 · answered by Frank N 7 · 0⤊ 0⤋
I do not know much physics but a simple observation which shows the relationship is the following:
the amount of mass determines the magnitude of gravity, which is measured by comparison to the force of gravity on a standard object (say a 1 kg mass) .
The acceleration (the change of rate of velocity with respect to TIME) on any object is a function of the mass (gravity).
This is the only understanding I have of gravity and time.
2007-07-07 15:14:12 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Well, there is one effect known as "time dilation." According to this phenomenon, the effects of time slow down the further you go into a gravitational field. For example, if there were two people holding clocks, one in space and one on Earth, and they were watching one hour pass on their clocks, they would both feel one hour pass at it's normal rate. However, if the person in space looked at the clock on earth, the earth clock may only read 50 minutes, even though an hour has passed for both.
2007-07-07 14:37:42 · answer #4 · answered by Anonymous · 0⤊ 0⤋
time is realted only with velocity of light,
gravity hasn't specific defination yet
2007-07-07 15:17:14 · answer #5 · answered by pra0007 2 · 0⤊ 1⤋
http://en.wikipedia.org/wiki/Gaussian_gravitational_constant
2007-07-07 14:31:26 · answer #6 · answered by Anonymous · 0⤊ 0⤋