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.
C) The elevator is accelerating downward.
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Distance divided by time
A. Gerard de Vaucouleurs |
B. Georges Lemaître |
C. Hubble’s Law |
D. Edwin Hubble |
E. Velocity or Speed |
F. Ho |
A super train is moving along a track at a speed close to the speed of light. You are watching the train from the ground. You observe lightning to strike in two places along the track, a mile apart, at precisely the same time. What would someone on the train say?
A) The two bolts of lightning struck at different times, and they struck at places that are less than a mile apart. B) The two bolts of lightning struck at different times, and they struck at places that are more than a mile apart. C) The two bolts of lightning struck at the same time, and they struck at places that are less than a mile apart. D) The two bolts of lightning struck at different times, and they struck at places that are precisely a mile apart.
The chef at the infamous Fattening Tower of Pizza tosses a spinning disk of uncooked pizza dough into the air. The disk becomes wider during its flight, while its rotational speed
A) remains constant. B) quickens. C) slows.
Why are there few odors emanating from a properly managed composting toilet?
A) Tight seals prevent the escape of odors. B) Odors are absorbed by a layer of water. C) Decomposition is aerobic. D) The ventilation system steers odors through a carbon filter.