Given that the speed of an electron in the ground state of hydrogen is 2190 km/s, what is the speed of an electron in the n = 4 orbit of hydrogen?
A) 547 km/s
B) 31,000 km/s
C) 139 km/s
D) 178 km/s
E) 2180 km/s
A
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A nuclear reactor is said to be critical when the average number of neutrons from each fission event that cause(s) another fission event is
a. <1. b. 1. c. >1. d. any of the above. e. only (b) or (c) above.
A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the average kinetic energy per molecule is
a. 6.7 × 10^?20 J. b. 1.0 × 10^?21 J. c. 1.0 × 10^?20 J. d. 6.7 × 10^?21 J. e. 1.3 × 10^?20 J.
Einstein's famous equation E = mc2 is a statement of the equivalence of energy and the square of the speed of light
a. True b. False Indicate whether the statement is true or false
During which type of process applied to an ideal gas is there no change in internal energy of the gas?
A) isobaric B) isothermal C) isochoric D) adiabatic E) Internal energy changes during any of these processes.