The only force acting on a 1.6-kg body as it moves along the x axis is given in the figure. If the velocity of the body at x = 2.0 m is 5.0 m/s, what is its kinetic energy at x = 5.0 m?
a.
52 J
b.
44 J
c.
36 J
d.
60 J
e.
25 J
c
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Why is the regolith light-colored in the highlands, while darker in the maria?
A. The highland regions receive more sunlight than the maria. B. The highland regolith is younger, and therefore lighter in color. C. Lunar regolith is the same color everywhere, but the maria reflect less light. D. The regolith in the maria has a different mineral composition.
Star A and Star B have same temperatures, but Star A is more luminous than Star B. Based on this information, which of the following must be the case?
A. Star A is larger than Star B. B. Star A is smaller than Star B. C. Star A and Star B have same size. D. Star A is more massive than Star B.
If the intensity of a sound is increased by a factor of 100, how is the decibel level changed? The new decibel level will be:
a. two units greater. b. double the old one. c. ten times greater. d. twenty units greater.
A curved mirror that cannot produce a real image of an object is ________.
Fill in the blank(s) with the appropriate word(s).