In walking barefoot on red-hot coals, providing that bits of coal do not stick to your feet, it would be safer if your feet are
A) wet.
B) dry.
C) either of these
D) none of the above
Answer: A
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Which of the following is not a line of evidence supporting the hypothesis that our Moon formed as a result of a giant impact?
A) The Pacific Ocean appears to be a large crater, probably the one made by the giant impact. B) Computer simulations show that the Moon could really have formed through a giant impact. C) The Moon's average density suggests it is made of rock much more like that of the Earth's outer layers than that of the Earth as a whole. D) The Moon has a much smaller proportion of easily vaporized materials than Earth.
Kepler's second law of planetary motion states that:
A) a planet moves at its greatest speed when it is closest to the Sun. B) the more massive a planet is, the more its speed will be. C) all the planets move around Earth in elliptical orbits. D) the mass of a planet determines how far the planet is from the Sun.
The SI units of acceleration are
a. mi/h. b. km/h. c. m/s. d. m/s2. e. none of the above
Between 0° and 4°C, the volume coefficient of expansion for water
a. is positive. b. is zero. c. is becoming less dense. d. is negative.