What is an extrasolar planet?
A) a planet that orbits a star that is not our own Sun
B) a planet that is larger than the Sun
C) a planet that is extra large compared to what we'd expect
D) a planet that is considered an "extra," in that it was not needed for the formation of its solar system
A
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Falling stars and shooting stars are simply other names for meteors
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A 50-turn circular coil (radius = 15 cm) with a total resistance of 4.0 ? is placed in a uniform magnetic field directed perpendicularly to the plane of the coil. The magnitude of this field varies with time according to B = A sin (?t), where A = 80 ?T and ? = 50? rad/s. What is the magnitude of the current induced in the coil at t = 20 ms?
A. 11 mA B. 18 mA C. 14 mA D. 22 mA E. zero
What method has been used to determine the most recent time the Tharsis volcanoes on Mars have erupted?
A) measuring the thickness of lava flows on their sides B) measuring the intensity of infrared radiation emitted by them C) measuring the changes in sulfur compound concentrations in the planet's atmosphere D) counting the craters on their slopes
The rest mass of a photon is zero kg
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