The diagram shows a planet at four positions in its orbit. At which position does it have the greatest angular momentum?
A) 1
B) 2
C) 3
D) 4
E) The angular momentum is the same at all four points.
E) The angular momentum is the same at all four points.
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How much power is theoretically available from a mass flow of 1 000 kg/s of water that falls a vertical distance of 120 m?
a. 1.18E+6 kW b. 1.20E+5 kW c. 1.18E+3 W d. 8.17E+1 W e. 1.18E+6 W
____ has (have) wavelengths that are longer than visible light
a. Gamma-rays b. Ultraviolet light c. Infrared radiation d. X-rays e. a, b and d above
Radiation pressure: The total electromagnetic power emitted by the sun is 3.8 × 1026 W. What is the radiation pressure it exerts on the perfectly absorbing surface of a satellite near the orbit of Mercury, which is 5.8 × 1010 m from the sun? The radiation strikes the surface of the satellite perpendicular to the surface. (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
The two men compete in a tug of war. Both pull equally and the scale reads 800 newtons. Each man must pull with a force of
1) 400 N. 2) 800 N. 3) 0 N. Consider action and reaction forces in this case: If action is the man on the left pulling on the rope, then the reaction force is 4) the rope pulling on the man on the left. 5) the rope pulling on the man on the right. 6) the man on the right pulling on the rope.