Blocks of ice buried in a glacial moraine often result in the formation of
A) drumlins.
B) roches moutonnees.
C) small glacial lakes—kettle lakes.
D) eskers.
Answer: C
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A bimetallic beam of aluminum (Ea 5 70 GPa) and copper (Ec 5 110 GPa) strips has a width of b 5 25 mm; each strip has a thickness of t 5 1.5 mm. A bending moment of 1.75 N?m is applied about the z axis. The ratio of the maximum stress in aluminum to that in copper is approximately:
(A) 0.6
(B) 0.8
(C) 1.0
(D) 1.5
When using rays to represent the direction of light, these are drawn
A. perpendicular to the wavefronts B. parallel to the wavefronts C. so they have no relation to the wavefronts
A 400-hp engine can deliver, in SI units, an average power of _____. (1 hp = 746 W)
a. 200 W c. 149,000 W b. 74,600 W d. 298,000 W
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The velocity acquired after starting from rest is __________
Fill in the blank(s) with correct word