Which ball is more elastic?
A) a common rubber ball
B) a steel ball
C) both the same
Answer: B
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Which of the following statements about the Moon is not true?
A) The Moon goes through its cycle of phases in about a month. B) The Moon's orbit around Earth is tilted about 5° to the ecliptic plane. C) The Moon's distance from Earth varies during its orbit. D) The Moon is visible in our sky only at night. E) The Moon rotates once in the same amount of time that it takes to orbit around Earth.
Which of the following is a unit conversion?
A) 10-9s B) 106W C) 1000 g D) 1 in = 2.54 cm E) 0.062 yd = 6.2 × 10-2 yd
The flywheel of a machine is rotating at 126 rad/s. Through what angle will the wheel be displaced from its original position after 6.0 s?
A) 21. radians B) 7.3 × 102 radians C) 1.2 × 102 ° D) 0.32 revolutions E) 7.3 × 10-2 revolutions
An object is at rest on the equator. Estimate its speed relative to the center of the Earth in m/s
1.less than 0.001 2.between 0.001 and 0.01 3.between 0.01 and 0.1 4.between 0.1 and 1 5.between 1 and 10 6.between 10 and 100 7.between 100 and 1,000 8.between 1,000 and 10,000 9.more than 10,000 10.Impossible to determine