An ideal monatomic gas cools from 455.0 K to 405.0 K at constant volume as 831 J of energy is removed from it. How many moles of gas are in the sample? The ideal gas constant is R = 8.314 J/mol ? K
A) 1.33 mol B) 0.725 mol C) 2.15 mol D) 2.50 mol E) 1.50 mol
A
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Physicists today consider the Bohr model of the atom to be
A) an accurate picture of a hydrogen atom. B) totally useless — of historical interest only. C) oversimplified, but nevertheless useful.
In a single-slit diffraction experiment, the width of the slit is 1.90 ?m. If a beam of light of wavelength 610 nm forms a diffraction pattern, what is the angle associated with the first minimum above the central bright fringe?
A) 9.35° B) 11.4° C) 12.2° D) 39.9° E) 18.7°
If the voltage applied to a parallel-plate capacitor is doubled, the electric field between the plates
A) is halved. B) quadruples. C) is tripled. D) remains the same. E) is doubled.
The pressure in the oil (S = 0.86) pipe is 12 kPa. The pressure in the water pipe is nearest:
(A) -34.8 kPa
(B) -28.8 kPa
(C) -18.8 kPa
(D) -13.1 kPa