What happens to the parallax as a star gets farther away?
A: Nothing.
B: The parallax increases as the distance increases.
C: The parallax decreases as the distance increases.
D: The parallax decreases and the distance decreases.
E: None of the above.
Answer: C: The parallax decreases as the distance increases.
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By convention, the direction of current in a circuit is
A) from the positive terminal of a source to the negative terminal. B) the direction in which positive charge flows. C) both of these D) neither of these
What would happen if Jupiter was suddenly replaced by a black hole with the same mass as Jupiter?
A) The orbits of the planets in our solar system would be unaffected. B) The other planets would slowly be pulled into Jupiter, but the Sun would be unaffected. C) The other planets and the Sun would slowly be pulled into Jupiter. D) The entire solar system would rapidly be sucked into the black hole.
A wave pulse traveling to the right along a thin cord reaches a discontinuity where the rope becomes thicker and heavier. What is the orientation of the reflected and transmitted pulses?
A) Both pulses are right side up. B) The reflected pulse returns right side up while the transmitted pulse is inverted. C) The reflected pulse returns inverted while the transmitted pulse is right side up. D) Both pulses are inverted.
The Doppler radial velocity technique works best for:
A) planets whose orbits are along our line of sight. B) planets whose orbits are perpendicular to our line of sight. C) planets whose orbits are nearly circular. D) planets whose orbits are very eccentric.