The study of life in the universe is best described by the term
A) astrochemistry
B) bioastronomy
C) astrobiology
D) exobiology
C
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How much would a teaspoon of white dwarf material weigh on Earth?
A) the same as a teaspoonful of Earthlike material B) about the same as Mt. Everest C) about the same as Earth D) a few tons E) a few million tons
When a 12-V battery powers a single 6-ohm lamp,
A) 2 joules flow in the lamp each second. B) 6 joules flow in the lamp each second. C) 12 joules flow in the lamp each second. D) none of the above
Of the various wavelengths emitted from a hydrogen gas discharge tube, those associated with transitions from higher levels down to the n = 2 level produce which of the following?
a. visible c. ultraviolet b. infrared d. a mixture of visible and ultraviolet
Size of the Nucleus: Calculate the estimated density of the nucleus of 
Sr? (mneutron ? mproton = 1.67 × 10-27 kg)
A. greater than 3.0 × 1020 kg/m3 B. 90 kg/m3 C. 2.1 × 1019 kg/m3 D. 2.0 × 1015 kg/m3 E. 2.3 × 1017 kg/m3