The rotation of a body in which different parts of the body have different periods of rotation is referred to as _____
A) translational rotation
B) periodical trajectory
C) partial trajectory
D) differential rotation
D
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Which of the following statements is true regarding shock waves?
A) They are predominantly transverse in nature. B) They can be produced by the birth of very hot stars. C) They are also called shear waves. D) They cannot be produced by supernova explosions.
The 3 K background radiation represents
A) the formation of the first galaxies. B) the outer edge of the universe. C) the Big Bang itself. D) the time of decoupling. E) formation of the first quasar.
When an object reaches its terminal speed, its acceleration is zero
Indicate whether the statement is true or false
In your office, you have a rolling chair and a rolling filing cabinet. The chair weighs 10 pounds, and the filing cabinet weighs 50 pounds (it's partly full). If you push both of them away with about the same strength
A. the chair will accelerate about 5 times as much as the cabinet. B. the cabinet will accelerate about 25 times as much as the chair. C. the chair will accelerate about 25 times as much as the cabinet. D. the cabinet will accelerate about 5 times as much as the chair. E. both will accelerate about the same.