A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is
a. 0.
b. 3 W.
c. 30 W.
d. 1,200 W.
e. 12,000 W.
d
Physics & Space Science
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In Ptolemy's geocentric model, retrograde motion occurs when the planet is closest to us, on the inside portion of the
A) ellipse. B) epicycle. C) equant. D) ecliptic. E) deferent.
Physics & Space Science
Refracting Telescope: The length of a telescope is 2.00 m and the focal length of the objective lens is 2.0 cm. What is the focal length of the eyepiece?
A. 200 cm B. 202 cm C. 101 cm D. 2.0 cm E. 198 cm
Physics & Space Science
Which of the following is a microsecond?
A) 109s B) 106s C) 1000 s D) 10-9s E) 10-6s
Physics & Space Science
The ? ring eccentricity seems to be caused by the eccentric orbits of Ophelia and Cordelia around Jupiter
a. True b. False Indicate whether the statement is true or false
Physics & Space Science