A 30.0 cm wrench is used to generate a torque at a bolt. A force of 40 N is applied perpendicularly at the end of the wrench. The torque generated at the bolt is
A. 5.0 N•m.
B. 7.0 N•m.
C. 9.0 N•m.
D. 12 N•m.
E. 20 N•m.
D. 12 N•m.
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a. True b. False Indicate whether the statement is true or false
A heavy ball hangs by a string, with a second string attached to its bottom. A slow pull on the bottom string breaks the
A) top string. B) bottom string. C) top or bottom string equally.
Comparing the clouds of Earth and Venus, we find that:
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Which one of the following processes of heat transfer requires the presence of a fluid?
a. conduction c. convection b. radiation d. None of the choices are valid.