Planet ________ creates the gaps in the Asteroid belt called Kirkwood gaps.
A. Mars
B. Jupiter
C. Saturn
D. Earth
Answer: B
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The gas motions within granules on the solar surface are
a. upward in the centers of some cells and downward in others; the gas cools as it passes between individual granules. b. actually motionless. The dark regions are absorption features from gases in the photosphere. c. upward in the bright cell centers and downward around the darker edges. d. downward in the bright cell centers and upward around the darker edges.
Find the force (magnitude and direction) exerted on an electron moving vertically upward at a speed of 
m/s by a horizontal magnetic field of 0.50 T directed north.
a. 
b. 
c. 
d. 
A 6.00 kg mass is located at (2.00 m, 2.00 m, 2.00 m) and a 5.00 kg mass is located at (–1.0 m, 3.00 m,–2.00 m). If this system of masses rotated about the Y-axis perpendicular to the Z-X plane, then the moment of inertia of this system is
A. 73 kg 
B. 66 kg
C. 60 kg
D. 55 kg
E. 48 kg
Saturn’s rings are composed of __________.
a. gas from the early solar system. b. a series of solid concentric circles. c. lots of individual particles of ice and rock. d. parts of Saturn’s upper atmosphere being vented into space