Earthquakes generate ________ that scientists can use to deduce the internal structure of Earth.
A. weather patterns
B. magnetic fields
C. electromagnetic waves
D. seismic waves
E. lava flows
Answer: D
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The molar specific heat of a diatomic ideal gas at constant volume is Cv = 5/2 R. What is the heat needed to heat 28.00 g of air from 20.00
to 85.00
?
A. 1,350 J B. 2,890 J C. 1,753 J D. 1,540 J E. 1,443 J
A seesaw made of a plank of mass 10.0 kg and length 3.00 m is balanced on a fulcrum 1.00 m from one end of the plank. A 20.0-kg mass rests on the end of the plank nearest the fulcrum
What mass must be on the other end if the plank remains balanced? A) 6.67 kg B) 7.50 kg C) 10.0 kg D) -10.0 kg E) 5.00 kg
Which of the following best characterizes electrical conductors?
a. low mass density b. high tensile strength c. electric charges move freely d. poor heat conductors
Warm air rises and cool air sinks. So, when an air parcel rises it becomes
A) cooler. B) warmer. C) more stable. D) less stable.