At absolute zero
A. all molecular motion is ceasing
B. the pressure of an ideal gas is zero
C. the volume of an ideal gas is zero
D. the Celsius temperature is zero
A. all molecular motion is ceasing
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If y = 0.02 sin (30x? 400t) (SI units), the wave number is
A. 30 rad/m. B. 30/2? rad/m. C. 400/2? rad/m. D. 400 rad/m. E. 60? rad/m.
If the acceleration vector of an object is directed perpendicular to the velocity vector,
A) the object is turning. B) the object is speeding up. C) the object is slowing down. D) the object is not moving. E) this situation would not be physically possible.
A quantity that is a measure of how the velocity of a body changes with time is
A. distance. B. acceleration. C. time. D. speed.
A stunt pilot performs a circular dive of radius 800 m. At the bottom of the dive (point B in the figure) the pilot has a speed of 200 m/s which at that instant is increasing at a rate of 20 m/s2. What acceleration does the pilot have at point B?
?
?
a.
m/s2
b.
