Estimate the maximum rotational energy (in electron-volts) for a free and freely-spinning diatomic hydrogen molecule in the L = 2 quantum state
The equilibrium separation for the atoms in the H2 molecule is 0.075 nm. (1 eV = 1.60 × 10-19 J, mproton = 1.67 × 10-27 kg, h = 6.626 × 10-34 J ? s)
A) 0.044 eV B) 0.011 eV C) 0.022 eV D) 0.033 eV
A
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A series RLC circuit has a 100-? resistor, a 0.100-?F capacitor and a 2.00-mH inductor connected across a 120-V rms ac voltage source operating at (1000/?) Hz. What is the resonant frequency of this circuit?
A) 70.7 kHz B) 17.9 kHz C) 22.5 kHz D) 35.3 kHz E) 11.3 kHz
Observer A sees a pendulum oscillating back and forth in a relativistic train and measures its period to be TA. Observer B moves together with the train and measures the period of the pendulum to be TB. These two results will be such that
A) TA > TB. B) TA = TB. C) TA < TB. D) TA could be greater or smaller than TB depending on the direction of the motion.
A column that extends from sea level to the top of the atmosphere contains a certain mass of air. If the column instead contained the same mass of water, its height would be about
A) 3/4 meter. B) 10.3 meters. C) 5.6 kilometers. D) none of the above
Define efficiency for an engine. Is it possible for an engine to have an efficiency equal to one?
What will be an ideal response?