An unbalanced force always produces
a) a circular motion.
b) an acceleration.
c) a state of equilibrium.
d) a constant velocity.
b
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Slanting Surfaces Without Friction: A 7.5-kg stone moves up frictionless hill that slopes upward at 41° above the horizontal. If the stone has an initial velocity of 8.5 m/s at the bottom, how far (as measured along the surface of the hill) will it go before stopping?
Fill in the blank(s) with the appropriate word(s).
What did the Wilkinson Microwave Anisotropy Probe (WMAP) measure?
a) differences in the temperature of radiation coming from the Big Bang from different directions b) the existence of a particle emitted through negative gravity c) the epoch of the formation of the first stars d) the existence of low mass dark matter particles e) the presence of supermassive black holes in the centers of nearly all galaxies
A far-sighted student has a near point of 1.0 m. Calculate the focal length (in cm) of the glasses needed so the near point will be normal (25 cm)
a. 72 b. 25 c. 33 d. 100 e. -33
In a meandering river, erosion is most notable on
A) the outer side of the meander. B) the inner side of a meander. C) both sides of a meander. D) the bottom of the stream channel.