When you adjust a telescope to get a clear image of Saturn's rings, in a small but measurable way you alter
A) the telescope.
B) Saturn's rings.
C) both of these
D) neither these
Answer: A
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In what sense are galaxies cosmic recycling plants?
In what sense are galaxies cosmic recycling plants?
The jovian planets
A) all lie less than 5 AU from the Sun. B) all have rings around their equators. C) all spin slower than the Earth. D) have satellite systems with less than 4 moons. E) are all much more dense than any of the terrestrials planets.
Natural processes tend to increase the __________ of thermodynamic systems
a. temperature c. Carnot efficiency b. internal energy d. entropy
The tapered shape of the wheel rims that ride on railroad tracks allows opposite wheels to
A) in effect, vary their diameters. B) travel at different linear speeds for the same rotational speed. C) both of these D) none of these