The deviation from the way a compass needle points from the true north direction is the
a. greenhouse effect.
b. magnetic inclination.
c. magnetic declination.
d. magnetic resonance effect.
e. none of the above
c
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Which of the following objects are probably not located in the same region of the solar system in which they originally formed?
A) Oort cloud comets B) Kuiper belt comets C) asteroids of the asteroid belt D) Pluto
Two electrons, "A" and "B," traverse the same region of a bubble chamber. Which of the following would cause electron B's path to curve more strongly than electron A's path?
A) Electron B is moving slower. B) Electron B has a larger mass. C) Electron B has a bad cold. D) Electron B is moving faster. E) Electron B has a larger charge.
An earthquake emits both P waves and S waves that travel at different speeds through the Earth. Suppose a P wave travels at 8000 m/s and an S wave at 4000 m/s. If P waves are received at a seismic station 20.0 s before an S wave arrives, how far is the station from the earthquake center?
a. 80 km c. 240 km b. 160 km d. 320 km
A student attaches a length of nylon fishing line to a fence post. She stretches it out and shakes the end of the rope in her hand back and forth to produce waves on the line. The most efficient way for her to increase the wavelength is to
a. increase the tension on the hose and shake the end more times per second. b. decrease the tension on the hose and shake the end more times per second. c. increase the tension on the hose and shake the end fewer times per second. d. decrease the tension on the hose and shake the end fewer times per second. e. keep the tension and frequency the same but increase the length of the hose.