In what way is Venus most similar to Earth?
A) Both planets are nearly the same size.
B) Both planets have similar atmospheres.
C) Both planets have similar surface geology.
D) Both planets have warm days and cool nights.
A) Both planets are nearly the same size.
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Which of these is the dominant mechanism for the removal of carbon dioxide from the atmosphere?
A) subduction B) photosynthesis in plants C) dissolving carbon dioxide in seawater D) formation of carbonate-rich rocks at the seafloor
If in Compton scattering of X-rays from a metal, the wavelength increases by 5% at an angle of 60°, what was the original wavelength before scattering?
What will be an ideal response?
We are measuring the spectra of two hydrogen gas clouds. The laboratory frame wavelength of one hydrogen line is 656.2 nm. Cloud A's emission line wavelength is 660.1 nm and Cloud B's emission line wavelength is 670.1 nm
What can we conclude about these clouds? A) They are both approaching us, and Cloud A is approaching faster than Cloud B. B) They are both receding from us, and Cloud B is receding faster than Cloud A. C) They are both approaching us, and Cloud B is approaching faster than Cloud A. D) They are both receding from us, and Cloud A is receding faster than Cloud B.
Maximum specific humidity is an ideal way to express capacity, because specific humidity
A) does not change as air expands or contracts. B) is a mass measurement—grams/kilograms. C) is the mass of water vapor per volume of air. D) is the pressure exerted by water vapor.