One of the changes experienced by a body of water when waste heat is added from a power plant is ________
a. an increase in water's capacity to hold oxygen
b. an increased spawning success for fish
c. an increased biological growing season
d. decreased eutrophication
c
CHAPTERS 10, 11, AND 12: ELECTRICITY
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A ball drops some distance and gains 30 J of kinetic energy. Do not ignore air resistance. How much gravitational potential energy did the ball lose?
A) more than 30 J B) exactly 30 J C) less than 30 J D) Cannot be determined from the information given.
The slope of a velocity vs. time graph is the __________
Fill in the blank(s) with correct word
Two very small plastic balls of equal mass are released from rest. One of them carries +10 µC of excess charge and the other one carries +1µC of charge. No other charges or fields are present
Which of the following statements are true about them as they move away from each other? (There may be more than one correct choice.) A) The acceleration of the 10-µC ball is 10 times that of the 1-µC ball. B) The acceleration of the 1-µC ball is 10 times that of the 10-µC ball. C) The balls always have accelerations of equal magnitude. D) The speed of the balls keeps increasing. E) The acceleration of the balls keeps increasing.
In the n = 1 state, the energy of the hydrogen atom is -13.6 eV. What is its energy in the n = 2 state?
A) -4.53 eV B) -1.51 eV C) -3.40 eV D) -6.79 eV