An astronomer would find a type Ia supernova in a distant galaxy useful as a(n) ____
a. spiral tracer
b. gravitational lens
c. age calibration
d. rotation curve
e. standard candle
e
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Protoplanets of the Jovian planets could have grown very hot from
a. heat for the sun. b. radioactivity of light elements such as hydrogen and helium. c. the in fall of material at high velocity. d. tidal forces due to the sun. e. collisions with large planetesimals.
The internal energy of a monatomic ideal gas is equal to which of the following?
a. (3/2)PV b. (3/2)nT/V c. 3 T/P d. none of the above
Somewhere between the Earth and the Moon is a point where the gravitational attraction of the Earth is canceled by the gravitational pull of the Moon. The mass of the Moon is 1/81 that of the Earth. How far from the center of the Earth is this point?
a. 8/9 the way to the Moon b. 9/10 the way to the Moon c. 3/4 the way to the Moon d. 80/81 the way to the Moon
Double-Slit Interference: 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 first bright fringe occur?
A. 1.56° B. 2.22° C. 3.12° D. 4.70° E. 6.24°