A coin underwater (left) appears closer than an identical coin in air (right). A tiny fish located next to the coin underwater would see the outside observer:

a. appearing closer than the real distance.
b. appearing farther than the real distance.
c. appearing exactly at the correct distance.


b

Physics & Space Science

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Uncertainty Principle Using Energy and Time: If the maximum possible accuracy in measuring the energy of a particle increases, the maximum possible accuracy in measuring its lifetime will

A. increase. B. decrease. C. not be affected.

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An 8000 kg satellite is launched from the surface of the earth, and injected into outer space a long distance from the earth. The kinetic energy needed to launch the satellite into outer space is

A.
B.
C.
D.
E.

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A sealed 26-m3 tank is filled with 2000 moles of oxygen gas (O2 ) at an initial temperature of 270 K. The gas is heated to a final temperature of 460 K

The ATOMIC mass of oxygen is 16.0 g/mol, and the ideal gas constant is R = 8.314 J/mol • K = 0.0821 L • atm/mol • K. The final pressure of the gas is closest to A) 0.29 MPa. B) 0.31 MPa. C) 0.33 MPa. D) 0.34 MPa. E) 0.36 MPa.

Physics & Space Science

During each cycle, the compressor in a certain ideal Carnot refrigerator performs 480 J of work to remove 150 J of thermal energy from the interior of the refrigerator

How much thermal energy do the coils behind the refrigerator discharge into the kitchen each cycle? A) 110 J B) 150 J C) 330 J D) 480 J E) 630 J

Physics & Space Science