What two quantities did Edwin Hubble compare for a sample of galaxies to discover the expansion of the universe?
A) velocity and distance
B) luminosity and distance
C) velocity and temperature
D) luminosity and temperature
E) age and distance
A) velocity and distance
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The microstructure of the grains of solid ? and ? phases that form in the lead-tin eutectic reaction is _____________ of the ? and ? phases.
Fill in the blank(s) with the appropriate word(s).
A parallel plate capacitor has plates each of area 100 cm2 and with separation 0.25 mm. What is its capacitance?
A. 40 nC
B. 0.35 nC
C. 4.4 
F
D. 88 pdf
E. 88 F
If you had something the size of a sugar cube that was made of neutron star matter, it would weigh
A) about as much as a large mountain. B) about 50 pounds. C) as much as the entire Earth. D) about as much as a truck.
What's wrong with the statement "heat rises?"
a. Nothing—heat does rise. b. One should say "energy rises.". c. One should say "heated air (or other fluid) rises.". d. none of the above