Which planet has a temperature of 400 degrees Centigrade on the side facing the Sun and -180 degrees Centigrade on the side opposite the Sun?
A. Venus
B. Mercury
C. Jupiter
D. Earth
E. Mars
Ans: B. Mercury
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Lightning occurs as water droplets in a cloud become electrically charged. Energy is positively charged
A) at the base of the cloud. B) at the top of the cloud. C) throughout the cloud. D) surrounding the cloud.
An inventor has created a heat engine that extracts energy from geothermal hotspots and geysers like Old Faithful at Yellowstone National Park. She claims to turn all of the geothermal energy into work. Such a device is
A. a violation of the first law of thermodynamics. B. consistent with Clausius's statement of the second law of thermodynamics. C. a violation of Kelvin's statement of the second law of thermodynamics. D. only possible for a Carnot cycle.
The light reflected from a soap bubble (n = 1.40) appears red (? = 640 nm) at its center. What is the minimum thickness (in nm)?
a. 124 b. 104 c. 114 d. 134 e. 234