Holography was invented by
A. Max von Laue.
B. Sir David Brewster.
C. Rosalind Franklin.
D. Dennis Gabor.
E. Bill Gates.
D. Dennis Gabor.
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If you compare two stars,
a. the one with the larger radius will always have the greater luminosity. b. the one with the higher surface temperature will always have the greater luminosity. c. the one with the smaller absolute magnitude will always have the greater luminosity. d. the one with the larger surface area has the greater energy flux from its surface.
The angular sizes of the Sun and Moon are about the same because
A) both objects have the same physical size. B) both objects are located the same distance away. C) the Sun is larger in size than the Moon by the same factor (about 400) that it is farther in distance. D) their angular sizes are an illusion created by the apparent locations on the celestial sphere.
Wrapping a hot potato in aluminum foil significantly reduces the rate at which it cools by
A) conduction. B) condensation. C) evaporation. D) melting.
A wheel of moment of inertia of 5.00 kg-m2 starts from rest and accelerates under a constant torque of 3.00 N-m for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?
A) 57.6 J B) 122.0 J C) 91.9 J D) 64.0 J E) 78.8 J