A meterstick is shot from a meterstick projector at a speed of 0.90c. How long will it be relative to an observer's frame of reference?
A. 2.3 m
B. 0.91 m
C. 1.0 m
D. 0.44 m
E. 0.81 m
Answer: D
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You are standing on a scale in an elevator and notice that your weight is lower than your normal weight. What do you conclude is occurring?
A) The elevator is accelerating upward. B) The elevator is moving at a constant velocity upward. C) The elevator is accelerating downward. D) The elevator is moving at a constant velocity downward. E) Your diet is working.
The term heat in physics is
A. equivalent to temperature. B. equivalent to internal energy. C. the same as work. D. any energy transferred to a body that raises the temperature of the body. E. energy transferred to a body because of a difference in temperature.
In a good insulator, the highest energy band containing electrons, called the valence band, is
A) only partially filled. B) completely filled.
Explain the greenhouse effect and the impact made by humans on the greenhouse effect
What will be an ideal response?