The peak of a body's blackbody radiation curve shifts toward longer wavelength as the temperature of the body __________
Fill in the blank(s) with correct word
decreases
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A BL Lac object is the same as a
a. Type 1 Seyfert. b. Type 2 Seyfert. c. double-lobed radio galaxy. d. blazar. e. quasar.
Neglecting friction, a small and a large block of ice begin sliding down an incline together. The larger block reaches the bottom
A) before the small block. B) after the small block. C) at the same time as the small block.
Which of the following best describes the nature and origin of the atmospheres of the Moon and Mercury?
A) They have thin tropospheres only, with gas coming from evaporation and sublimation. B) They have thin exospheres only, with gas coming from impacts of subatomic particles and photons. C) They have only small amounts of gas, all of which is leftover from outgassing long ago. D) They have very thin atmospheres produced by outgassing, but still have the layers of a troposphere, thermosphere, and exosphere.
The density of a column of air decreases as altitude increases because
A. Air contracts as pressure decreases B. Air expands as pressure decreases C. Nonsense, the density of air is constant. D. Nonsense, the density of air increases as altitude increases.