If a nucleus of Th absorbs a neutron and the resulting nucleus undergoes two successive beta decays (emitting electrons), what nucleus results?
A) Americium-232
B) Plutonium-232
C) Thorium-233
D) Uranium-233
D
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Discuss and analyze the patterns of immigration to Latin America as well as patterns of emigration from Latin America after independence in the 19th Century.
What will be an ideal response?
In a fractionating tower, the crude oil vapors pass from a pipe still into the column. Tar and lubricating stock are the first components to be pulled off at the bottom. Nearer the top kerosene is pulled off followed by gasoline and finally natural gas at the very top. From this information, which has a higher boiling point, gasoline or kerosine?
A. Their boiling points are the same, but kerosene has the greater density. B. Gasoline has the higher boiling point. C. Fractional distillation components are pulled off based on molecular weight, so it is not possible to know which has the higher boiling point from the information given. D. Kerosene has the higher boiling point.
Downcutting is usually most prominent along the ________ part of a stream valley
A) lower B) upper C) delta D) interfluve E) widest
Which of the following bases is not a lactam?
A) adenine B) cytosine C) guanine D) None, they are all lactams.