How much kinetic energy must a deuterium ion (charge 1.6 1019 C) have to approach to within 1014 m of another deuterium ion? (1 MeV = 1.6 1013 J)
[Ques. 2] The number of daylight hours at 40S is greatest during the month of
a. June.
b. December.
c. September.
d. March.
[Ques. 3] A heat engine
a. converts heat to work.
b. converts heat to internal energy.
c. transfers heat from a low-temperature reservoir.
d. converts work to heat.
[Ques. 4] In the Lawson number what do the n and stand for?
a. ion density, critical ignition temperature
b. ion density, confinement time
c. neutrino density, confinement time
d. ion density, critical ignition temperature
e. neutrino density, reaction mean life
[Ques. 5] The number of hours of daylight at any place on Earth depends on
a. the latitude only.
b. the day of the year only.
c. both the latitude and the day of the year.
d. none of these.
[Ques. 6] A quantity that gives the direction of a thermodynamic process is
a. entropy.
b. efficiency.
c. specific heat.
d. energy.
[Ques. 7] A nuclear reactor is said to be critical when the average number of neutrons from each fission event that cause(s) another fission event is
a. <1.
b. 1.
c. >1.
d. any of the above.
e. only (b) or (c) above.
[Ques. 8] Which of the following is true? The number of daylight hours depends on
a. the International Date Line.
b. the longitude.
c. the latitude.
d. all of these.
[Ques. 9] For every natural process, the entropy of the universe
a. is destroyed.
b. decreases.
c. increases.
d. remains constant.
[Ques. 10] In neutron capture by an atomic nucleus, the mass number of the nucleus changes by
a. 2.
b. 1.
c. 0.
d. +1.
e. +2.
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