Which of the following types of radiation might be best for medical imaging?
A) Gamma radiation would be best because it penetrates the best.
B) Alpha radiation would be best because it penetrates the least and therefore does the least damage.
C) Beta radiation would be best because it can be measured electrically.
D) Only X-rays are used for medical imaging.
E) none of the above
A
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In which of the following ways can suspended particles in the atmosphere affect climate?
A. They reflect incoming radiation onto the Earth's surface. B. They absorb latent heat from the atmosphere. C. They reflect outgoing infrared radiation from the Earth's surface. D. They absorb incoming radiation onto to the Earth's surface.
In sunlight, nitrogen dioxide reacts with hydrocarbons and other gases to produce ____
A) weather elements B) surface ozone C) the ionosphere D) pollution
In which stages of the Demographic Transition is the rate of natural increase (RNI) low?
A) stage 1 and stage 3 B) stage 1 and stage 4 C) stage 2 and stage 3 D) stage 2 and stage 4 E) stage 3 and stage 4
Most yard waste is
A. disposed of in landfills. B. burned. C. eliminated by source reduction. D. composted.