The Michelson interferometer can make precise length measurements using which of the following phenomena?
a. resolving power
c. force
b. magnification
d. interference
D
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As the 21st century began, which of the following is a discovery made by astronomers?
A) The Universe has a center. B) The expansion of the Universe is actually accelerating. C) The Universe has an edge. D) The expansion of the Universe has come to a halt.
As it orbits the Earth, the Moon appears to move eastward about its own diameter every hour
Indicate whether the statement is true or false
When a wheel is rolling without slipping, the magnitude of its velocity relative to the ground is greatest at
A. the point in contact with the ground. B. the point at the center of the wheel. C. the point at the top of the wheel opposite to the point in contact with the ground. D. the point farthest forward from the center of mass of the wheel. E. the point farthest behind the center of mass of the wheel.
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds are
A) larger. B) smaller. C) the same size.