The motion of atoms and molecules that most affects temperature is
A) translational.
B) rotational.
C) vibrational.
D) none of the above
Answer: A
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In the diagram below, what is the diameter of Mercury?
a. about 240 km
b. about 2400 km
c. about 24,000 km
d. about 240,000 km
e. about 2.4ยด106 km
Isolated quarks were first observed in
A. 1938. B. 1955. C. 1976. D. 2001. E. Isolated quarks have not been observed.
Tension is actually a force that tends to
A) stretch something. B) compress something. C) break something. D) balance something.
A uniform beam with a mass of 120 kg and a length of 5.0 m rests on two supports, one at the left edge and one 3.0 m from the left edge. How close to the right edge can a 68-kg person walk along the beam without causing it to tip over?
A) 1.6 m B) 1.8 m C) 0.88 m D) 1.5 m E) 0.50 m