A ball is thrown upward and caught when it returns. Compared with its initial speed and in the presence of air resistance, the speed with which it is caught is
A) more.
B) less.
C) the same.
D) need more information.
Answer: B
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For which of these forms of life is it hardest to apply present criteria for life, based on its behavior when isolated?
A) a bacterial spore B) a plant seed C) a virus D) a fungus spore E) a slime mold
Suppose you built a scale-model atom in which the nucleus is the size of a tennis ball. About how far would the cloud of electrons extend?
A) several kilometers B) several centimeters C) a few meters D) to the Sun
A battery in a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 3 ohms. What is the voltage of the battery?
When you tune a radio to a certain station, you match the frequency of the internal electrical circuit to the frequency of that radio station, which illustrates
A) forced vibrations. B) resonance. C) beats. D) reverberation. E) wave interference.