The half-life of 3H is 12 years. About how long does it take for 127/128 of a sample of that radionuclide to decay?
a. 7 years
b. 11.9 years
c. 12.1 years
d. 84 years
[Ques. 2] Which of the following is not a member of the low-cloud family?
a. Nimbostratus cloud
b. Fog
c. Stratus cloud
d. Cirrus cloud
[Ques. 3] The half-life of 3H is 12 years. About how long does it take for 7/8 of a sample of that radionuclide to decay?
a. 3 years
b. 24 years
c. 4 years
d. 36 years
[Ques. 4] Clouds described as artist's brushes or mare's tails belong to what cloud family?
a. Middle
b. Low
c. High
d. None of these
[Ques. 5] After two half-lives have gone by, what fraction of the original sample of a radionuclide remains?
a. 1/8
b. 1/4
c. 1/3
d. None of these
[Ques. 6] The conterminous United States lies predominantly in which wind zone?
a. Westerlies
b. Northeast tradewinds
c. Polar easterlies
d. Doldrums
[Ques. 7] After seven half-lives have elapsed, what fraction of the original amount has changed into another element?
a. 6/7
b. 13/14
c. 127/128
d. None of these
[Ques. 8] The rate at which air temperature changes with altitude is called
a. the inversion rate.
b. vertical development.
c. the lapse rate.
d. an isotherm.
[Ques. 9] After seven half-lives have elapsed, what fraction of the original amount of radionuclide remains?
a. 1/7
b. 1/14
c. 1/128
d. None of these
[Ques. 10] Land and sea breezes result from
a. the Coriolis force.
b. convection cycles.
c. low-pressure areas.
d. high-pressure areas.
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