Which of the following statements about fission or fusion is true?
A) Fission begins with one reactant and yields two atomic products and a release of energy.
B) Fission begins with two reactants and yields one atomic product and a release of energy.
C) Fusion combines three reactants and yields one atomic product and a release of energy.
D) Fusion begins with one reactant and yields two atomic products and a release of energy.
A
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What remains unchanged regardless of depth?
A) Wavelength B) Wave height C) Wave period D) All of these choices
What is the path of waves in a storm?
a. ?Waves move inward toward the storm center. b. ?Waves move outward from the storm center. c. ?Waves move in a circular path around the storm center. d. ?Waves take random paths as a storm moves through. e. ?Waves move forward and back under the storm center.
Which of these regions is mostly covered with grasslands?
A) llanos of Venezuela B) cerrados of Brazil C) pampas of Argentina D) all of the above E) none of the above
If a septic system is to be used for sewage disposal,
A. the surrounding soil must be impermeable to contain the wastes. B. in normal operation, all potential pollutants will be decomposed. C. the soil should be unsaturated, containing sufficient air (oxygen) to permit aerobic breakdown of wastes. D. high population density is required for efficient operation.