The Moon's average density is
a. greater than Earth's.
b. less than Earth's.
c. approximately the same as Earth's.
d. nonexistent because water is not present.
b
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What kind of activity does the surface of Triton experience?
a. nitrogen geysers b. sulfur-based volcanoes c. carbon dioxide geysers d. methane ice tectonics e. liquid nitrogen lava flows
The magnitude of the magnetic field that a long and extremely thin current-carrying wire produces at a distance of 3.0 µm from the center of the wire is 2.0 × 10-3 T. How much current is flowing through the wire? (?0 = 4? × 10-7 T ? m/
A) A) 30 mA B) 190 mA C) 19 mA D) 380 mA
Two long parallel wires placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you
From your point of view, the magnetic field at the point exactly midway between the two wires A) points up. B) points down. C) points toward you. D) points away from you. E) is zero.
Two isotopes of uranium have the same
a. mass number b. neutron number c. atomic number d. nucleon number e. nucleon number and neutron number