The primary purpose of a telescope is to:
A) collect a large amount of light and bring it into focus.
B) magnify distant objects.
C) separate light into its component wavelengths.
D) make distant objects appear nearby.
E) measure the brightness of stars very accurately.
A
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Two forces of magnitude 50 N, as shown in the figure below, act on a cylinder of radius 4 m and mass 6.25 kg. The cylinder, which is initially at rest, sits on a frictionless surface. After 1 second, the velocity and angular velocity of the cylinder in m/s and rad/s are respectively
A. v = 0; ? = 0. B. v = 0; ? = 4. C. v = 0; ? = 8. D. v = 8; ? = 8. E. v = 16; ? = 8.
Process of Science: Name a testable hypothesis of nebular theory that was shown to be false in observations of extrasolar planets. Must we throw out the theory and start from scratch, i.e
, is the observation completely inconsistent with a nebular formation?
What do astronomers mean by a constellation?
A) A constellation is a region in the sky as seen from Earth. B) A constellation is a group of stars related through an ancient story. C) A constellation is any random grouping of stars in the sky. D) A constellation is a group of stars that are all located in about the same place in space.
Most of the information about the Moon's internal structure comes from ________ left on the lunar surface by Apollo astronauts
Fill in the blank(s) with correct word