A _______ is used to produce and analyze a spectrum
a. photo
b. spectrograph
c. photometer
d. charge-coupled device
b
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How can we mathematically express Newton's law of gravity? (In the following, F is the force of Gravity, G is a constant; m and M are the masses or two bodies (such as Earth and the Sun); and r is the distance between the centers of mass of the two bodies.)
A. F = GMm/r2 B. F = Gm2M/r2 C. F = GMm/r3 D. F = GMm/r
How do the densities of the jovian and terrestrial planets compare?
A) Made from the same solar nebula, they are all similar. B) More massive jovians all have high densities, compared to the tiny terrestrials. C) All terrestrials are more dense than any of the jovians. D) The closer a planet lies to the Sun, the less its density. E) No real pattern here; densities vary greatly and are very individual to each world.
For electric current in the home, your power company supplies
A) energy. B) electrons. C) both of these D) neither of these
Earthquake S waves are
a. transverse. b. sometimes longitudinal and sometimes transverse. c. longitudinal. d. neither longitudinal nor transverse.