Materials composed of molecules that absorb large amounts of energy in the form of vibrations and rotations have
A) low specific heat capacities.
B) high specific heat capacities.
C) none of the above
Answer: B
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Why is the possible contamination of the Earth by Martian microbes in a future sample return mission not considered to be a significant problem?
A) Martian microbes will certainly be destroyed by terrestrial microbes B) any Martian microbes will be destroyed by high-energy particles and radiation on their trip back to Earth C) Martian microbes will be rapidly destroyed by oxygen in the Earth's atmosphere D) Martian microbes are likely to be quite different than terrestrial microbes and, hence, will probably not be able to affect life on Earth
Power: A resistance heater is rated at 1200 W when operating at 110 V dc. What current will it draw?
A. 0.090 A B. 1.0 A C. 11 A D. 12 A
If a force on an object is aimed perpendicular to the direction of the object's velocity, the force does
a. no work c. negative work b. positive work d. any of the above
The reason that a surface appears darker when wet has to do with
A) the darkness of liquids. B) conversion of light to lower frequencies. C) absorption of multiply-reflecting light inside the wet region.