Which terrestrial world experiences the greatest change between its daytime temperature and night temperature?
A) Mercury
B) Venus
C) Earth
D) Mars
E) the Moon
A) Mercury
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The Kelvin form of the second law of thermodynamics states that
A. an engine can take heat from a single reservoir and convert it all to work B. no engine can take heat from a single reservoir and convert it all to work C. an engine can have a greater efficiency than a Carnot engine
A light ray enters a glass enclosed fishtank. From air it enters the glass at 20.° with respect to the surface, then emerges into the water. The index for glass is 1.50 and for water 1.33
(a) What is the angle of refraction in the glass? (b) What is the angle of refraction in the water? (c) Is there any incident angle in air for which the ray will not enter the water due to total internal reflection?
A solar or lunar eclipse will occur
a. when the Sun is near the line of nodes of the Moon, and the Moon is new or full.
b. any time the Moon is new or full.
c. when the Sun is near the solstice, and the Moon is new or full.
d. half-way through an eclipse year.
e. when the Sun is near the equinox, and the Moon is new or full.
A cube of wood of density 0.780 g/cm3 is 11.2 cm on a side. When placed in water, what height of the block will float above the surface? (water density = 1.00 g/cm3)
a. 8.74 cm b. 11.2 cm c. 2.46 cm d. 3.46 cm e. 1.46 cm