The type of heat transfer that occurs between the radiator of a car and the atmosphere, when the car is in motion, is principally
A)
convective.
B)
conductive.
C)
radiative.
D)
countercurrent.
E)
evaporation.
A
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What is the giant impact hypothesis for the origin of the Moon?
A) The Moon originally was about the same size as Earth, but a giant impact blasted most of it away so that it ended up much smaller than Earth. B) The Moon formed just like the Earth, from accretion in the solar nebula. C) The Moon formed when two gigantic asteroids collided with one another. D) The Moon formed from material blasted out of the Earth's mantle and crust by the impact of a Mars-size object.
Imagine a magnetic field pointing into the plane of this page. An electron moves across the paper from left to right. The direction of the magnetic force on the electron will be
A. out of the plane of the paper. B. in the plane of the paper and toward the bottom of the page. C. into the plane of the paper. D. in the plane of the paper and toward the top of the page. E. in the plane of the paper and opposite the electron's velocity.
Granite is a common type of
A) meteoritic rock B) metamorphic rock C) igneous rock D) sedimentary rock
Relativity is the
A) study of how space, energy, and mass are related to time. B) concept that there are no absolutes that can be postulated. C) idea that space bends in relationship to the square of the mass contained within it. D) study of wormholes and time travel.