A large ice mass that flows on a land surface under the influence of gravity is called
a. a glacier.
b. a land slide.
c. an ice river.
d. none of these.
a
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At the summer solstice in June, at what latitude is the sun directly overhead at solar noon?
A. 0.0
(the equator)
B. 23.5
N
C. 23.5 S
D. 66.5 N
E. 40.0N
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
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to Exhibit 16-1. A point or points at which the object has positive velocity and zero acceleration is(are)
A. B B. C C. D D. B and D E. A and E
A gasoline engine absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle. The efficiency of the engine is
a. 80%. b. 40%. c. 60%. d. 20%. e. 50%.