In the development of a terrestrial planet, the stage of ____ occurred when molten rock flowed through fissures and filled deep basins
a. differentiation
b. cratering
c. glaciation
d. accretion
e. flooding
E
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The bell with the highest natural frequency is relatively
A) small. B) large. C) either of these
In order for two objects to have the same temperature, they must
A. be in thermal equilibrium. B. be in thermal contact with each other. C. have the same relative "hotness" or "coldness" when touched. D. have all of the properties listed above. E. have only properties (b) and (c) above.
A particle (mass = 6.0 mg) moves with a speed of 4.0 km/s in a direction that makes an angle of 37° above the positive x axis in the xy plane. At the instant it enters a magnetic field of (5.0
) mT it experiences an acceleration of (8.0
) m/s2. What is the charge of the particle?
A. ?4.8 ?C B. 4.0 ?C C. ?4.0 ?C D. 4.8 ?C E. ?5.0 ?C
An engine is designed to obtain energy from the temperature gradient of the ocean. What is the thermodynamic efficiency of such an engine if the temperature of the surface of the water is 59°F (15°C) and the temperature well below the surface is 41°F (5°C)?
A. 3.5% B. 67% C. 31% D. 17% E. 96%