When Jean standing on slippery ice catches her leaping dog Daisy, the momentum of both Jean and Daisy after the catch is
A) greater than their combined momentum before the catch.
B) equal to their combined momentum before the catch.
C) somewhat less than their combined momentum before the catch.
Answer: B
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Consider the interference colors in a film of gasoline on a wet street. The water provides a
A) means of spreading the gasoline into a thin film. B) means of slowing the rapid evaporation of gasoline. C) chemical bond with the gasoline. D) second reflecting surface. E) all of the above
When objects at different temperatures are brought into thermal contact with one another, the resulting spontaneous flow of heat proceeds from the object with the higher
A) thermal conductivity to the one with the lower thermal conductivity. B) specific heat to the one with the lower specific heat. C) heat capacity to the one with the lower capacity. D) temperature to the one with the lower temperature. E) impossible to predict on the basis of this data.
When a bar magnet is thrust into a coil of wire, a greater voltage is induced with
A) a greater number of loops in the coil. B) faster thrusting motion. C) a stronger bar magnet. D) all of the above
Particles composed of quarks are
a. photons. b. leptons. c. neutrinos. d. W and Z bosons. e. baryons and mesons.