A nearsighted person has a far point that is 4.2 m from his eyes. What focal length lenses must he use in his contact lenses to allow him to focus on distant objects?
A) -4.2 m
B) 4.2 m
C) -5.2 m
D) 5.2 m
E) 4.8 m
A
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Energy is transported from the tropics to the polar regions chiefly by
A) winds. B) ocean currents. C) interchange of carbon dioxide. D) none of the above
A flat coil having 160 turns, each with an area of 0.20 m2, is placed with the plane of its area perpendicular to a magnetic field of 0.40 T
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Consider a situation where two moving objects collide, stick to each other, and move off together. The energy of a body moving across a horizontal surface is an example of kinetic energy
Indicate whether the statement is true or false