The sun is 
km from the Earth. How long does it take for light to travel this distance?
A. 
B. 
C. 
D. 
E. 
D.
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The highest-strength titanium alloys are the STA _________alloys
Fill in the blank(s) with the appropriate word(s).
__________is a graph of orbital velocity versus radius in the disk of a galaxy
A) A rotation curve B) A normal distribution C) The H-R diagram D) The light curve
Molecular Rotation: Estimate the maximum rotational energy (in electron-volts) for a free and freely-spinning diatomic hydrogen molecule in the L = 2 quantum state. The equilibrium separation for the atoms in the H2 molecule is 0.075 nm. (1 eV = 1.60 × 10-19 J, mproton = 1.67 × 10-27 kg, h = 6.626 × 10-34 J ? s)
A. 0.011 eV B. 0.022 eV C. 0.033 eV D. 0.044 eV
A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi. The net force on 2 square inches of the tire is
a. 28 lbs. b. 32 lbs. c. 60 lbs. d. 88 lbs. e. none of these.