Which of the following did NOT contribute to the thinning of the Martian atmosphere during its early history?
A) the photodissociation of water molecules by ultraviolet light in the atmosphere
B) the stripping of the atmosphere by solar wind particles from the Sun
C) the consumption of carbon dioxide by photosynthetic bacteria
D) atmospheric gases being blasted into space by large impacts
C
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Venus is visible to us:
a) only during its new phase. b) only near sunrise or sunset. c) only in the summer. d) only in the winter. e) only during the several hours around midnight.
Substitute the correct prefix to the fun-word "103-mockingbird"
A) deci B) tera C) peta D) pico E) kilo
For a pair of dice, how many microstates are there that result in the macrostate of rolling a 7?
a. 1 b. 5 c. 6 d. 7 e. 36
Electrons are used to produce X-rays by allowing a beam of electrons to strike a heavy metal surface. When the intensity of the electron beam is increased, this results in:
A. X-rays being produced having longer wavelength B. X-rays being produced having higher energy C. More X-rays produced per unit time D. Faster X-rays being produced