Which of the following statements about net energy is false?
a. Some forms of energy have a higher net energy ratio than others.
b. The useable amount of high-quality, useful energy available from a given quantity of energy resource is called its net energy yield.
c. All forms of energy supply the same amount of net energy yield.
d. Both the first and second laws of thermodynamics govern the use of fossil fuels and other energy resources.
e. Only the first law of thermodynamics governs the use of fossil fuels and other energy resources.
C
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Why do pyroclastic flows always have higher casualty tolls than lava flows?
A) Pyroclasic flows are much hotter. B) Lava flows are better predicted. C) Pyroclastic flows occur more often. D) Pyclastic flows move at velocities exceeding 100 km/hr.
What is the largest known reservoir of hydrocarbons on Earth?
A) Oil B) Methane hydrate C) Coal D) None of these choices
In 1998, Hurricane Mitch hit Central America and caused a catastrophe that was magnified by the practice of ________
Fill in the blank(s) with correct word
The molar mass of gold is approximately 197 g. What is the approximate mass of one atom of gold?
A) 3.06 x 10^21 g B) 197 g C) 5.08 x 10^-3 g D) 3.27 x 10^-22 g