What is the cosmic microwave background?
A. radiation released when neutral atoms formed in the young Universe
B. radio noise from Seyfert galaxies
C. radiation from the first stars formed when the Universe was young
D. radiation from hot gas in intergalactic space
Answer: A
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The elastic modulus of a material, except for elastomers, is proportional to the _____________of the interatomic potential.
Fill in the blank(s) with the appropriate word(s).
A ly (light year) is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in a ly? (1 mi = 1609 m and 1 yr = 365.25 days)
A) 9.46 × 1012 mi B) 9.46 × 1015 mi C) 5.88 × 1012 mi D) 5.88 × 1015 mi E) 2.87 × 1013 mi
The adiabatic index of a gas is given by which of the following?
a. CP /CV b. CV /CP c. CP ? CV d. CP + CV
The earth's northern magnetic pole acts like
A) it has negative charge. B) it has positive charge. C) it has no charge. D) the north pole of a magnet. E) the south pole of a magnet.