As air rises, it expands. It expands because it moves to
A) a region of higher air pressure.
B) a region of lower air pressure.
C) an area of greater humidity.
D) an area of cooler air temperature.
Answer: B
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Consider the ratio of the surface area of a cylinder to its volume. Assume the height is equal to its diameter. What happens to this ratio if the diameter of the cylinder decreases by a factor of 2?
A. Remains the same B. Decreases by a factor of 2 C. Increases by a factor of 2 D. Decreases by a factor of 4 E. Increases by a factor of 4
An 18-mm wide diffraction grating has rulings of 880 lines per mm. Monochromatic light of 590 nm wavelength is incident normally on the grating
What is the largest angle, measured from the central bright spot, at which an intensity maximum is formed? A) 23° B) 25° C) 31° D) 29° E) 27°
The ________ is the spherical outgassing as a comet nucleus is heated by the Sun
Fill in the blank(s) with correct word
What happens to its moment of inertia when a steel disk is heated?
a. It increases. b. It decreases. c. It stays the same. d. It increases for half the temperature increase and then decreases for the rest of the temperature increase.