Giga
2009-04-18 00:43:57 UTC
Gravity is result of curvature created in SpaceTime by Mass.
Just ask for your money back and try another subject.Bye
Sanny
It is interesting tho that time changes if you are going at different
speed, like the atomic clocks on the aeroplane. I'm not sure why this is
not regarded as proof that time is real in philosophical circles? It
could well be that philosophers just don't understand the science, or
maybe there is a good reason.
laid by the Easter Bunny. It could well be that you just don't understand
the bullshit, or maybe there is a bad reason.
http://en.wikipedia.org/wiki/Hafele-Keating_experiment
The there is the relativity compensation added to GPS satelite's clocks:
Relativity
Satellite clocks are slowed by their orbital speed but sped up by their
distance out of the Earth's gravitational well.
According to the theory of relativity, due to their constant movement and
height relative to the Earth-centered inertial reference frame, the clocks
on the satellites are affected by their speed (special relativity) as well
as their gravitational potential (general relativity). For the GPS
satellites, general relativity predicts that the atomic clocks at GPS
orbital altitudes will tick more rapidly, by about 45.9 microseconds (?s)
per day, because they have a higher gravitational potential than atomic
clocks on Earth's surface. Special relativity predicts that atomic clocks
moving at GPS orbital speeds will tick more slowly than stationary ground
clocks by about 7.2 ?s per day. When combined, the discrepancy is about 38
microseconds per day; a difference of 4.465 parts in 1010.[58] To account
for this, the frequency standard on board each satellite is given a rate
offset prior to launch, making it run slightly slower than the desired
frequency on Earth; specifically, at 10.22999999543 MHz instead of 10.23
MHz.[59] Since the atomic clocks on board the GPS satellites are precisely
tuned, it makes the system a practical engineering application of the
scientific theory of relativity in a real-world environment. Placing atomic
clocks on artificial satellites to test Einstein's general theory was first
proposed by Friedwardt Winterberg in 1955.[60]
Also from wiki GPS page.
Wow I feel immortalish.