Suppose the date is March 21 and the Sun passes through your zenith at noon. Where are you?
A) the equator
B) the Tropic of Cancer
C) the Tropic of Capricorn
D) the Arctic Circle
E) the Antarctic Circle
A
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Rotational Kinetic Energy: What is the kinetic energy of a 120-cm thin uniform rod with a mass of 450 g that is rotating about its center at 3.60 rad/s?
A. 0.350 J B. 4.20 J C. 0.700 J D. 0.960 J E. 2.10 J
Lunar eclipses do not occur every full Moon, because the path of the ________ is tilted relative to the ________.
A. Sun; ecliptic B. Moon; ecliptic C. Earth; ecliptic D. Moon; equator
If the scattering angle of the light in Compton's scattering experiment is 90°,
what is the change in the wavelength of the light? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 1.22 × 10-12 m B) 3.65 × 10-12 m C) 4.85 × 10-12 m D) 2.42 × 10-12 m
The calibration used to build a distance scale reaching from the size of Earth to the most distant visible galaxies is referred to as the__________
A) distance grid B) distance model C) distance candle D) distance ladder