Use of a parabolic mirror, instead of one made of a circular arc surface, can be used to reduce the occurrence of which of the following effects?
a. mirages
c. chromatic aberration
b. spherical aberration
d. light scattering
B
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At apogee, the Moon is at its farthest from the Earth and thus appears larger than normal. Because of this, it can produce total solar eclipses, but not annular solar eclipses
Indicate whether the statement is true or false
The changing shapes of constellations in the night sky is caused by
A) the rotation of our planet about its axis. B) the revolution of our planet around the Sun. C) the movement of our planet within the Milky Way. D) the tilt of Earth's axis.
Chinook winds tend to
A) warm an environment. B) cool an environment. C) cool deserts at night. D) warm deserts at sunrise.
Angular and Linear Quantities: A scooter has wheels with a diameter of 120 mm. What is the angular speed of the wheels when the scooter is moving forward at 6.00 m/s?
A. 47.7 rpm B. 955 rpm C. 72.0 rpm D. 50.0 rpm E. 100 rpm