Entropy is a measure of the _____ of a system
a. disorder
c. heat
b. temperature
d. internal energy
A
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Which of the following is an almost reversible process?
A. The explosion of hydrogen and oxygen to form water. B. Heat transfer through thick insulation. C. The adiabatic free expansion of a gas. D. A slow isothermal compression of a gas. E. A slow leakage of gas into an empty chamber through a small hole in a membrane.
A conducting bar moves as shown near a long wire carrying a constant 50-A current. If a = 4.0 mm, L = 50 cm, and v = 12 m/s, what is the potential difference, VA?VB?
A. +15 mV B. ?15 mV C. +20 mV D. ?20 mV E. +10 mV
If sunlight peaks at 0.55 ?m wavelength, this infers a surface temperature of the sun of how many thousand degrees Kelvin?
A) 9.5 B) 5.3 C) 2.5 D) 25. E) 15.
A hydrogen atom is in the 6h state. Which one of the following is not a magnetic quantum number?
A) 0 B) 1 C) 2 D) 4 E) 6