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 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:
A) both are made chiefly of water vapor. B) ours lie in the troposphere, within 10 kilometer of our surface, but Venus has a higher troposphere, with its clouds about 40 kilometers high. C) like ours, they rotate around Venus slower than Venus rotates on its axis. D) Venus has much more carbon dioxide, so dry ice clouds dominate. E) Venus is too hot for clouds to form, so we see only a barren world telescopically.
The Milky Way and the Milky Way Galaxy are the same thing
a. True b. False Indicate whether the statement is true or false
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.