The disadvantages to fission power plants include
A) radioactive waste disposal.
B) production of plutonium for possible weapons proliferation.
C) risk of accidental release of radioactivity.
D) all of the above
E) none of the above
Answer: D
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Phil stands at rest with both feet on a scale that reads 500 N. After he gently lifts one foot, the scale reads
A) less than 500 N. B) 500 N. C) more than 500 N.
The ciliary muscle of the eye is relaxed under which condition?
a. eye is focused on a distant object b. eye is focused on a nearby object c. subject being viewed is well illuminated d. subject being viewed is dimly illuminated
In an engine operating in the Otto cycle, the final volume of the fuel-air mixture is one sixth the initial volume. Assume ? = 1.4 . The maximum theoretical efficiency of this cycle is
a. 17%. b. 49%. c. 51%. d. 56%. e. 83%.
The statement that objects dropped from above the surface of Earth fall to the surface is
a. probably true, but we'll have to observe it next time to be sure it's true. b. scientific truth, accepted as gospel. c. probably true on Earth and on other planets as well. d. only true if we look at the object while it falls. e. proven true by scientific experiments.