A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. (a) For points OUTSIDE the loop, the magnetic field caused by this current A
circles the loop in a clockwise direction. B) circles the loop in a counterclockwise direction. C) points straight up. D) points straight down. E) is zero. (b) For points INSIDE the loop, the magnetic field caused by this current A. circles the loop in a clockwise direction. B) circles the loop in a counterclockwise direction. C) points straight up. D) points straight down. E) is zero.
(a) D (b) C
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The jovian planets are thought to have formed as gravity drew hydrogen and helium gas around planetesimals made of __________.
a. only rocks and metals b. only ices c. rocks, metals, and ices d. rocks, metals, ices, and hydrogen and helium gases
Sometimes on a hot day a distant dry street appears wet, which is due to
A) water from a previous rainfall. B) reflection of the sky from the street. C) refracted sky light.
The wavelength of a wave multiplied by the frequency of the wave is the wave's
a. speed. b. frequency. c. wavelength. d. amplitude. e. loudness.
The piston of a cylinder containing a quantity of ideal gas is advanced so that the volume of the gas is decreased by one-half. A pressure gauge on the cylinder shows the pressure of the gas to have increased threefold in the process. By what factor does the temperature of the gas change?