A light ray bends when it goes from one medium to another because of
a. interference
b. diffraction
c. specular reflection
d. refraction
e. polarization
D
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The Andes Mountains in South America are examples of ______________ mountains
Fill in the blank(s) with correct word
A child is standing at the rim of a rotating disk holding a rock, and throws a rock in direction (2) at the instant shown. The disk rotates freely without friction. What happens to the angular speed of the disk?
You throw a Frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the Frisbee. Ignoring air resistance, the torque exerted about its center of mass by gravity is
a. 0. b. mgr. c. 2mgr. d. a function of the angular velocity. e. small at first, then increasing as the Frisbee loses the torque given it by your hand.
A lunar eclipse that occurs when the moon moves completely into Earth's umbral shadow is called
a. a total solar eclipse. b. a partial solar eclipse. c. an annular solar eclipse. d. a penumbral lunar eclipse. e. an umbral lunar eclipse.