According to Einstein's equivalence principle, which of the following cannot be distinguished from a system accelerating with uniform acceleration in the presence of no gravity by any measurement within the system?
A)
a system moving with constant velocity in the presence of no gravitational force
B)
a system that only contains massless objects
C)
a system that is not accelerating, but is subject to a uniform gravitational acceleration
D)
a system that is moving at the speed of light
E)
a system in free fall
C
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In a nonlinear elastic material, the ratio of the applied stress to the total strain is the _____________modulus.
Fill in the blank(s) with the appropriate word(s).
All of the following are dimensionless except
A) specific gravity. B) Reynolds number. C) strain. D) bulk modulus.
The Cassini probe Huygens made a soft landing on Titan
Indicate whether the statement is true or false
When light escapes from near a black hole, we see a(n) ________ redshift
Fill in the blank(s) with correct word