Two charged bodies separated by a distance d exert a repulsive electrical force on each other. The signs of the charges on the two bodies might be
a. + and +.
b. – and –.
c. + and –.
d. any of the above.
e. not determinable.
a, b
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What basic type of reaction is illustrated by the general equation A + B ? AB?
a. Combination b. Decomposition c. Double-replacement d. Single-replacement
A charged particle moves with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves
A) upward at an angle of 45° above the horizontal. B) straight upward. C) straight downward. D) horizontally.
The type of energy that a swinging pendulum has at the high point of its swing is
A) thermal. B) kinetic. C) spiritual. D) elastic. E) gravitational.
Vision Problems: A person cannot see clearly objects more than 70.0 cm away. What power of corrective lens should be prescribed if the glass is to be worn 1.00 cm in front of the eye?
A. 1.45 diopters B. -1.45 diopters C. 0.0145 diopters D. -0.0145 diopters