Tidal friction between the Earth and the Moon causes
A) the Earth's rotation to slow gradually and the Moon to move gradually closer to the Earth
B) the Earth's rotation to quicken gradually and the Moon to move gradually farther from the Earth
C) the Earth's rotation to slow gradually and the Moon to move gradually farther from the Earth
D) the Earth's rotation to quicken gradually and the Moon to move gradually closer to the Earth
C
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If an object of mass 9 kg has a velocity of 7 m/s, what is its linear momentum?
a. 63 kg-m/s b. 1.3 kg-m/s c. 0.78 kg-m/s d. 16 kg-m/s e. cannot be determined
A fast-moving missile soaring overhead possesses
A) speed. B) force. C) both of these D) neither of these
What was the Ptolemaic model?
A) an Earth-centered model of planetary motion published by Ptolemy B) the Earth-centered model of the cosmos in which the Earth was surrounded by seven perfect spheres, one each for the Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn C) a Sun-centered model of planetary motion published by Ptolemy D) the first scientific model to successfully predict solar and lunar eclipses
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. E. B. F. C. G. D. H. E. A.