A dump truck has a loosely tied canvas over its empty bed, which is full of still air. As the truck speeds down the highway, the canvas will tend to
A. get pushed onto the load.
B. billow outward from the load.
C. lay limply in a jumbled pile.
D. smooth out in a level, horizontal plane.
Answer: B
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Suppose you drop a feather and a hammer on the Moon from the same height at the same time. What will happen?
A) The feather will hit the ground first. B) They will hit the ground at the same time. C) The hammer will hit the ground first. D) They will float at the height you release them.
Monochromatic light is light of a single
A) wavelength. B) frequency. C) color. D) all of the above E) none of the above
An AC series circuit has 18.9-? resistance, 21.1-? inductive reactance, and 15.5-? capacitive reactance. If an effective (rms) emf of 94 V is applied, what is the power output?
a. 2.34E+2 W b. 1.60E+2 W c. 4.66E+2 W d. 4.30E+2 W e. 2.32E+2 W
The seasons are caused by Earth's orbit moving closer to or farther from the Sun
a. True b. False Indicate whether the statement is true or false