Three essential components of a nuclear reactor are: a fissionable fuel ,a coolant to transfer the heat, and
A) a "scrubber" to prevent radioactive isotopes from getting into the environment.
B) a radioactive substance to keep the reaction going.
C) tritium to speed up the neutrons.
D) control rods.
E) lead to stop the neutrons.
D
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If we find v = A ?, where ? is a length and v is a speed, what are the mks units for the A?
A) s-1 B) m2/s C) m/ s2 D) s E) kg-m/s
Sound: Seven seconds after a brilliant flash of lightning, thunder shakes the house. Approximately how far was the lightning strike from the house?
A. much closer than one kilometer B. about one kilometer away C. about two kilometers away D. much farther away than two kilometers E. It is impossible to say.
Which of the following is not expected for a "hot Jupiter" that orbits 0.05 AU from its star?
A) cloudtop temperatures over 1000 K B) intense volcanism C) clouds made of rock dust D) density similar to or lower than Jupiter's
The point in the phase diagram where the vapor pressure curve ends is called the
A) critical point. B) triple point. C) melting point. D) boiling point. E) double point.