The amount of usable high-quality energy from an energy resource is its ____________________.
Fill in the blank(s) with the appropriate word(s).
net energy yield
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The shape of a raindrop:
A) remains constant throughout the journey from cloud to ground. B) is initially that of a tear. C) flattens out on the bottom as it falls. D) is not affected by drag.
The pycnocline can occur at the same range of depths as a halocline
Indicate whether the statement is true or false
Which subsystem of Earth supplies heat for convection in the mantle?
A)atmosphere B)hydrosphere C)biosphere D)core E)lithosphere
There is an urgent need to improve the recycling strategy for e-wastes because
A) there is no profit to be made from the materials. B) they contain toxic but valuable materials, and U.S. recyclers tend to outsource to China. C) it has been easier and safer to dispose of e-wastes in landfills. D) e-wastes contain large amounts of radioactive materials.