A violation of the second law of thermodynamics would occur if

a. a ball lying on the ground started to bounce.
b. transfer of energy by heat moved energy from an object at low temperature to an object at a higher temperature.
c. a motion picture was run backwards through the projector.
d. any of the above occurred.
e. (a) or (b) occurred, but not (c).


e

Physics & Space Science

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A mass hangs from a spring that is fixed to the ceiling. The mass is now pulled down and released so the mass oscillates up and down. Which of the following statements is true?

A. The gravitational force on the mass oscillates at the same frequency as the mass B. The kinetic energy of the oscillating mass is a constant C. Adding mass to the spring will make it oscillate faster D. The restoring force of the spring is equal to the weight of the mass E. None of these choices are true

Physics & Space Science

The quark structure of the proton is uud

Indicate whether the statement is true or false

Physics & Space Science

A light ray is partially reflected and partially refracted at a boundary between two media, the upper one having index of refraction n, the lower one having index of refraction n', as shown in the figure. The reflected ray is perpendicular to the refracted ray when

A.

.

B.
.

C.
.

D.
.

E.
.

Physics & Space Science

This sequence of paintings shows how a large gas cloud can collapse to become a much smaller, spinning disk of gas. What law explains why the center of the cloud becomes so much hotter as the cloud shrinks in size?

A) the law of conservation of energy B) the universal law of gravitation C) the law of conservation of angular momentum D) Newton's second law of motion

Physics & Space Science