Deuterium is more abundant on Venus than elsewhere in the solar system. What do we think this fact tells us about Venus?
A) It was formed in a part of the solar nebula where deuterium condensed easily.
B) It was formed in a part of the solar nebula where deuterium was surprisingly abundant.
C) It once had a substantial amount of water in its atmosphere.
D) It once had an atmosphere made mostly of hydrogen.
E) Its volcanoes outgassed primarily carbon dioxide and deuterium, but little water.
C) It once had a substantial amount of water in its atmosphere.
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A proton consists of 3 quarks, two with charge +2e/3 and one with charge –e/3 . Of the following, which is closest to the approximate potential energy of the arrangement of the two positive quarks if they are separated by 10–15 m?
a. 1 MeV c. 1012 MeV b. 10–19 MeV d. 100 MeV
In a series LRC circuit, Kirchhoff's loop rule
A) is obeyed. B) would be obeyed but the voltages are not in phase. C) would be obeyed but the currents and voltages are not in phase. D) is not obeyed. E) would be obeyed but the currents are not in phase.
Coulomb's Law: Two tiny beads, each of mass 3.2 g, carry equal-magnitude charges. When they are placed 6.4 cm apart and released in outer space, they begin to accelerate toward each other at 538 m/s2. What is the magnitude of the charge on each bead? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 510 nC B. 44 nC C. 1800 nC D. 890 nC E. 1300 nC
At lower elevations the air is generally
A) warm and heavy. B) warm and light. C) cool and heavy. D) cool and light.