Dana uses a rope to pull a box that weighs 600 N across a level surface with constant velocity. The rope makes an angle of 40° above the horizontal and the tension in the rope is 400 N. What is the coefficient of friction?
a. 0.89
b. 0.88
c. 2.00
d. 1.19
e. 0.84
a
Physics & Space Science
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How many significant figures are in 576,000?
A) 3 B) 4 C) 5 D) 6 E) ambiguous
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Emission nebula, such as M42, are much brighter than planetary nebulae, so are better suited for finding the distances to other galaxies
Indicate whether the statement is true or false
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A child sits on a swing supported by ropes of length 4.0 m. With what frequency will she need to apply the driving force to maintain swinging?
a. 0.29 Hz c. 0.25 Hz b. 0.48 Hz d. 0.38 Hz
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