Nuclear Reactions: In the nuclear reaction 
H + 
H ? X + 
He, what is X?
A. 2 protons
B. 2 neutrons
C. 2H
D. 3H
E. alpha particle
Answer: B
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In a two-slit experiment, monochromatic coherent light of wavelength 600 nm passes through a pair of slits separated by 2.20 × 10-5 m. At what angle away from the centerline does the second dark fringe occur?
A) 4.70° B) 3.51° C) 3.94° D) 1.17° E) 2.34°
Precession is
A) when the elliptical orbits of planets slip forward with each revolution. B) the process of planetary evolution. C) the stage before planets stabilize into a stationary orbit. D) the wobbling of a planet's axis of rotation.
Jupiter and the other jovian planets are sometimes called "gas giants." In what sense is this term misleading?
A) The materials they are made of are not the kinds of thing we usually think of as gases. B) They actually contain relatively little material in a gaseous state. C) Actually, it's a great description, because these worlds are big and gaseous throughout. D) They are not in any sense "giants."
An AC voltage source, with a peak output of 114 V, is connected to a 40.0-? resistor. What is the effective (or rms) current in the circuit?
a. 2.02 A b. 1.43 A c. 2.85 A d. 4.03 A e. 5.70 A