If a gas cloud shrinks, it
A) spins slower.
B) spins faster.
C) spins at the same rate as it did before it shrank.
B
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Suppose that the planet Mercury were magically replaced with a baseball. The magnitude of the net force exerted on the baseball would be
A. equal to that exerted on Mercury B. greater than that exerted on Mercury C. less than that exerted on Mercury
A 2C charge and a 4C charge attract each other with 10N of force. How much will a 2C charge and a 12C charge attract each other when placed the same distance apart?
a. 5N. b. 12N. c. 10N. d. 30N.
A plane has an eastward heading at a speed of 156 m/s (relative to the air). A 20.0 m/s wind is blowing southward while the plane is flying. The velocity of the plane relative to the ground is
A) 157 m/s at an angle 7.31° south of east. B) 157 m/s at an angle 7.31° east of south. C) 155 m/s at an angle 7.36° south of east. D) 155 m/s at an angle 7.36° east of south. E) 157 m/s at an angle 7.36° south of east.
For every two trips around the Sun, Mercury only spins about its rotational axis three times.
Answer the following statement true (T) or false (F)