A ball of mass 5 kg attached to a string is swung in a horizontal circle of radius 0.5 m. If the tension in the string is 10 N, the work done by the tension in one revolution is ________ J.
Fill in the blank(s) with the appropriate word(s).
zero
0
0.0
0.
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Retrograde motion
a. is observable for planets located between Earth and the sun. b. is observable for planets more distant from the Sun than is Earth. c. is only observable for the moon. d. is observable for all planets. e. none of the above
How might a pulsar appear to an observer?
A) It may appear to flash several times per second or more with near perfect regularity. B) It may slowly get dimmer and brighter with a period ranging from several days to several weeks. C) It may appear to flash at random intervals. D) It may appear to change color very rapidly, from blue to red and back again, with near perfect regularity. E) Its spectrum may alternate between showing blueshifts and redshifts very rapidly with near perfect regularity.
Is the TMA always greater than the AMA for a machine? Explain
Spectral analysis shows us that the composition of the Sun is ____.
Fill in the blank(s) with correct word