A potential difference of 12.4 V is placed across a 4.1
resistor. What is the current in the resistor?
A. 51 A
B. 3.0 A
C. 0.33 A
D. 16A
E. 8.3 A
B. 3.0 A
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Evidence that there is a considerable amount of water frozen under the surface of Mars is provided by all of the following except
A. satellite measurements of water in the polar caps. B. discovery by the Mars rovers of chemicals in surface rocks formed in the presence of large amounts of water. C. squishy-looking flow patterns around crater impact sites. D. features resembling channels cut by flowing water. E. periodic eruptions of geysers when subsurface ice is melted by volcanic activity.
Iron meteorites are believed to come from
A) the core of a differentiated asteroid, now broken up. B) the crust of a differentiated asteroid, now broken up. C) interstellar space. D) debris from the Kuiper Belt. E) a broken up cometary nucleus.
A spaceship moving past the Earth with a speed of 0.800c signals to the Earth with pulsed laser photons emitted at 10.0-second intervals according to the spaceship's clock. According to observers on Earth who see the flashes, the time interval they measure is
a. 13.4 s b. 16.7 s c. 12.5 s d. 9.70 s e. 6.03 s
In a superconductor, the electrical conductivity is infinite below the _________temperature.
Fill in the blank(s) with the appropriate word(s).