Object A is twice as warm as object B. Object A
A) emits twice as much energy as object B.
B) emits half as much energy as object B.
C) emits four times as much energy as object B.
D) emits 16 times as much energy as object B.
Answer: D
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Countries that have a high proportion of economic self-sufficiency or independence from the world system, and do not contribute significantly to the world economy in terms of imports and exports, are
A) autarkies. B) anarchies. C) oligarchies. D) hegemonies. E) neo-Fordists.
At 10°C, which is more concentrated-a saturated solution of sodium nitrate, NaNO3, or a saturated solution of sodium chloride? (See figure shown above)
A. At 10°C, a saturated solution of sodium nitrate, NaNO3, is more concentrated than a saturated solution of sodium chloride, NaCl. B. At 25°C, a saturated solution of sodium nitrate, NaNO3, is more concentrated than a saturated solution of sodium chloride, NaCl. C. At 10°C, a saturated solution of sodium chloride, NaCl, is more concentrated than a saturated solution of sodium nitrate, NaNO3 D. At 20°C, a saturated solution of sodium nitrate, NaNO3, is more concentrated than a saturated solution of sodium chloride, NaCl.
A car has a head-on collision with another car of the same momentum. An identical car driving with the same speed as the first car runs into an enormously massive wall. The greatest impulse will occur on the car that is in the collision with the
A) approaching car. B) wall. C) Both impulses will be the same.