Which of the following is a form of high-level nuclear waste?
A) used nuclear fuel rods
B) used water that has been circulating through the core of a reactor
C) used protective clothing that has been worn by some nuclear power plant workers
D) All of the above.
E) None of the above.
A
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Based on current estimates of the value of Hubble's constant, approximately how old is the universe?
A) 10 billion years old B) 12 billion years old C) 14 billion years old D) 18 billion years old E) 20 billion years old
Which of the following is not an example of potential energy?
a. The energy stored in a pile driver. b. The energy stored in a stretched spring. c. The energy of a body moving across a horizontal surface. d. The energy in the water at the top of a waterfall.
Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, and again take note of the brightness. Repeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, the power
delivered by the battery (neglect the battery’s internal resistance) 1.increases. 2.decreases. 3.remains the same. 4.Need more information.
Rising air expands and cools. The rate of cooling depends on
A) the air's moisture content. B) the dry adiabatic lapse rate. C) the energy of the water-vapor molecules. D) temperature inversions.