On the Kelvin temperature scale, a body's temperature is directly related to its ________.
A. kinetic energy due to its motion through space
B. mass
C. internal energy content
D. kinetic energy due to rotation
E. None of these choices are correct.
Answer: C
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Which of the following is true of Mars's atmosphere?
A) It is mostly composed of carbon dioxide. B) It is mostly composed of nitrogen. C) It is as inhospitable as the Moon's atmosphere. D) It is as dense as Venus's atmosphere.
Uniform Circular Motion: A particularly scary roller coaster contains a loop-the-loop in which the car and rider are completely upside down. If the radius of the loop is 13.2 m, with what minimum speed must the car traverse the loop so that the rider does not fall out while upside down at the top? Assume the rider is not strapped to the car.
A. 11.4 m/s B. 12.5 m/s C. 10.1 m/s D. 14.9 m/s
Why do we always see only one side of the Moon?
A. The Moon is tidally locked with Earth. B. The Moon does not rotate. C. The far (opposite) side only faces Earth during the daytime when the Sun's light outshines the Moon. D. From time to time we see all the sides of the Moon from Earth.
A pulley system holding a rope that is pulled out a distance of 20 m is used for lifting a 2500 kg grand piano. The piano can be raised 3 m by application of a 375 N force to the rope
What will be an ideal response?