How long does it take the Earth to complete one orbit around the Sun?
A) one year
B) one day
C) one month
D) one week
E) The time it takes Earth to orbit the Sun changes significantly from one orbit to the next.
A) one year
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Energy Conservation With Nonconservative Forces: A heavy sled and a light sled, both moving horizontally with the same kinetic energy, suddenly slide onto a rough patch of snow and eventually come to a stop. The coefficient of kinetic friction between the sleds and the rough snow is the same for both of them. Which of the following statements about these sleds are correct? (There could be more than one correct choice.)
A. Both sleds will slide the same distance on the rough snow before stopping. B. The heavy sled will slide farther on the rough snow than the light sled. C. The light sled will slide farther on the rough snow than the heavy sled. D. On the rough snow, the change in kinetic energy will be the same for both sleds. E. The friction from the snow will do the same amount of work on both sleds.
As a body falls through air starting from rest, its acceleration
a. is zero. b. stays constant. c. continuously decreases. d. continuously increases. e. gets smaller and smaller, eventually approaching zero.
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
a.
E.
b.
F.
c.
G.
d.
H.
e.
A.
Evaporation and precipitation are greatest over the
A) polar ice caps. B) continents. C) oceans. D) equator.