You are originally 1.0 m beneath the surface of a pool. If you dive to 2.0 m beneath the surface, what happens to the absolute pressure on you?
A)
It quadruples.
B)
It more than doubles.
C)
It doubles.
D)
It less than doubles.
E)
It does not change.
D
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What happens to the visible light radiated by stars located within a dusty gas cloud?
A) It is blocked by dust and its energy is thereby lost. B) It is absorbed by dust, which heats the dust grains so that they emit the absorbed energy as infrared light. C) It is reflected by dust back to the star from whence it came. D) It passes through the cloud unaffected.
Dmitri places one end of a copper rod in a heat reservoir and the other end in a heat sink. By what factor is the rate of heat flow changed when the temperature difference between the reservoir and sink is doubled?
a. 2.0 c. 4.0 b. 1/2 d. 1/4
An electron has a velocity of 6.0 × 10^6 m/s in the positive x direction at a point where the magnetic field has the components Bx = 3.0 T, By = 1.5 T, and Bz = 2.0 T. What is the magnitude of the acceleration of the electron at this point?
a. 2.1 × 10^18 m/s2 b. 1.6 × 10^18 m/s2 c. 2.6 × 10^18 m/s2 d. 3.2 × 10^18 m/s2 e. 3.7 × 10^18 m/s2
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.