A player catches a ball. If action is the force of the ball against the player's glove, reaction is the
A) player's grip on the glove.
B) glove against the ball.
C) friction of the ground against the player's shoes.
D) muscular effort in the player's arms.
E) none of the above
Answer: B
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Ignoring air resistance, the velocity of a falling object
A. is constant B. increases for a while, then becomes constant. C. depends on the mass of the object. D. is constantly increasing
G. Easterbrook(25) has said: "The population growth for the next 2 generations is 100 percent cast in stone. Nothing short of world pestilence or a nuclear war can halt population growth for the next 2 generations.
And with the growth in the world's population that is inevitable through the next 2 generations at least, global resource consumption is going to have to rise. That's the only possible moral outcome, so that millions of people don't die in misery. We're going to have to manage a short-term drastic increase in global resource consumption. And the only way we're going to be able to get through the night with that, is with strong environmental regulations and optimism about the success of reform in technology." Agree or disagree with Easterbrook, citing specific reasons.
A torque of 15.0 N•m is applied to a bolt. The bolt rotates through an angle of 360 degrees. The work done in turning the bolt is
A. 94.2 J. B. 91.3 J. C. 96.7 J. D. 89.9 J. E. 98.1 J.
Zero degrees on the Celsius scale
corresponds to what reference point? a)the ice point b)the steam point c)absolute zero d)212 degrees Fahrenheit