Galileo found the rotation period of the Sun was approximately:
A) a day.
B) a week.
C) a month.
D) three months.
E) a year.
C
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General Questions: The figure shows two boxes, with m1 > m2, that are on a level frictionless surface. We can apply a horizontal force 
either toward the right on m1 or toward the left on m2. The magnitude of the force that the boxes exert on each other is
A. zero newtons in either case.
B. larger if 
is applied toward the right.
C. larger if 
is applied toward the left.
D. the same in either case.
Velocity Addition: A person in a rocket ship traveling past the earth at a speed of 0.500c fires a laser gun in the forward direction. With what speed does an observer on Earth measure for the light pulse?
Fill in the blank(s) with the appropriate word(s).
____ has (have) wavelengths that are longer than visible light
a. Gamma-rays b. Ultraviolet light c. Infrared radiation d. X-rays e. a, b and d above
A single force acts on an object and the torque caused by the force is nonzero about some point. Is there any other point about which the torque is zero?
1.Yes, under any circumstance there is such a point. 2.No. 3.Yes, but only if the force is centripetal. 4.It is impossible to determine.