As the disk rolls up the incline in the situation described in the previous problem, the friction force acting on the disk does
A. positive work on the disk.
B. negative work on the disk.
C. no work on the disk.
C. no work on the disk.
Physics & Space Science
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Answer the following statement true (T) or false (F)
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What type of nebula is the Horsehead?
a. Primitive b. Bright emission c. Bright reflection d. Dark
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Which of these is a transverse wave?
A) a Slinky shaken to and fro. B) a radio wave C) a sound wave D) all of the above E) none of the above
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Storms
a. develop as a consequence of frontal activity. b. are atmospheric disturbances. c. develop within a single air mass. d. all of the above
Physics & Space Science