Consider the two systems below, labeled A and B
A B
Which gas has the higher pressure?
1.A
2.B
3.Neither; the pressures are the same.
4.Impossible to determine
3
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the magnetic field increases in magnitude with time.
A. The induced current flows clockwise. B. The induced current flows counterclockwise. C. No current flows in the loop. D. A current flows, but one needs additional information to determine the direction in which it flows. E. One needs additional information to determine even whether a current flows or not.
A diatomic molecule is vibrating in the v = 1 quantum state with a frequency of 2.0 × 1013 Hz
What is its vibrational energy? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 0.12 eV B) 0.17 eV C) 0.041 eV D) 0.083 eV
A blacksmith is flattening a steel plate having dimensions 10 cm × 15 cm × 1 mm. He has heated the plate to 900 K. If the emissivity of the plate is 0.75,
at what rate does it lose energy by radiation? Ignore any heat exchange with the surroundings. (? = 5.67 × 10-8 W/m2 ? K4 ) A) 360 W B) 760 W C) 790 W D) 850 W E) 880 W
Although Earth's gravitational influence gets weaker with distance, we believe that it extends as far as the
A. Sun. B. edge of the solar system. C. edge of the galaxy. D. universe extends.