Which of the following might be considered a viable application of a radioactive tracer?
A) adding a stream of radioisotopes to waste water to examine where pollution goes when it flows into the ocean
B) placing radioactive sources around a room to trace the location of people as they move through the room
C) embedding a radioactive plug in a valuable necklace so that its location can be determined using a Geiger counter
D) all of the above
E) none of the above
A
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One way to study development is by proportion of economic activity in "sectors." The sector concerned with information based services is referred to as
A. primary B. secondary C. tertiary D. quaternary
Weathered volcanic ash and lava produce excellent fertile soils.
Answer the following statement true (T) or false (F)
Nuclear power will probably continue to be a part of energy production, particularly in countries that lack fossil-fuel reserves.
Answer the following statement true (T) or false (F)
The waste gas released by plants as they synthesize food sugars from carbon dioxide and water is ________
A) methane B) carbon dioxide C) nitrogen D) oxygen