A 4.00-liter container is divided into two equal parts, one part containing 0.0100 mole of neon, and the other part containing 0.0100 mole of helium. The divider is removed and the gases mix. What is the change in entropy (in J/K) of this system?
a. 0.0576
b. 0.115
c. 0.173
d. 0.0864
e. 0.144
b
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A neutron passes by Earth at relativistic speed. Earth scientists observe the process of the neutron decaying into a proton, an electron, and a neutrino. Compared to the same type of process on Earth, earthbound observers would say that the process in the moving neutron
A. No process in another reference frame can be observed. B. appears to happen faster. C. appears to happen at the same rate. D. appears to happen more slowly.
A hydrogen atom initially in the n = 6 state decays to the n = 2 state. The emitted photon is detected in a photographic plate. What is the wavelength of the detected photon?
The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s) A) 1090 nm B) 93.1 nm C) 410 nm D) 93.8 nm
Which of the following best defines screencast?
A. A video podcast. B. The process of converting an analog video to digital. C. RWD technique to adjust video to fit the user's screen size. D. A video of a computer screen's changing content over time.
One sometimes hears reference to a "20-kiloton" bomb. What does this mean?
A) It means 20,000 tons of nuclear explosive is used in the bomb. B) It means that the number of "fissile" nuclei is equal to the number of trinitrotoluene molecules in 20,000 tons of TNT explosive. C) It means that the total weight of the bomb (not just the uranium) is 20,000 tons. D) It means that the energy released by the bomb is equal to the energy released when 20,000 tons of TNT is exploded. E) This refers to the maximum pressure generated by the bomb when it explodes.