The extent of thermal escape in a planetary atmosphere is dependent
A) only on the temperature of its atmosphere
B) on the temperature and molecular weight of the gases in its atmosphere
C) only on the thickness of its atmosphere
D) only on molecular weight of the gases in its atmosphere
B
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If the spectrum of a sunspot shows that it has a maximum intensity at 650 nm, what is the temperature of the sunspot?
a. 650 K b. 5000 K c. 1950 K d. 4500 K e. 10,000 K
The eye parts iris, retina, cornea, and ciliary muscle, play roles related to ________, ________, ________, and ________ in a camera
a. the aperture, the lens, the ccd, focusing b. the aperture, the ccd, the lens, focusing c. the lens, the aperture, focusing, the ccd d. the lens, focusing, the ccd, the aperture
Typical stellar spectra appear as:
A) a series of bright, colored lines. B) an unbroken rainbow of colors. C) a rainbow, but with some dark lines mixed in. D) a rainbow with some bright lines on top of the continuum. E) a very redshifted rainbow due to the expansion of the universe.
The Bohr radius of the hydrogen atom is 0.529 × 10-10 m. What is the radius of the n = 2 state?
A) 0.265 × 10-10 m B) 4.23 × 10-10 m C) 1.06 × 10-10 m D) 2.12 × 10-10 m E) 0.529 × 10-10 m