What is the maximum kinetic energy (in eV) of a photoelectron when a surface, whose work function is 5.0 eV, is illuminated by photons whose wavelength is 400 nm?
a. 3.1
b. ?1.9
c. 1.9
d. 0
e. 1.2
d
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Why would the pressure of a gas affect the extinction coefficient?
What will be an ideal response?
Suppose we have a quantum system of an unknown type. We find that a certain amount of energy ?E moves this system from its lowest possible energy to its second-lowest energy, but 
?E is required to get it to its next higher energy. Is this quantum system a quanton in a box, a hydrogen atom, or a simple harmonic oscillator?
A. A quanton in a box. B. A hydrogen atom. C. A simple harmonic oscillator. D. The stated facts are inconsistent with all of these models.
After a supernova explosion, the remains of the stellar core
A) will always be a neutron star. B) be either a neutron star or a black hole. C) will always be a black hole. D) may be either a white dwarf, neutron star, or black hole.
A cylinder contains 10 moles of an ideal gas at a temperature of 300 K. The gas is compressed at constant pressure until the final volume equals 0.77 times the initial volume
The molar heat capacity at constant volume of the gas is 24.0 J/mol ? K and R = 8.31 J/mol ? K . How much heat is absorbed by the gas during this process? (R = 8.31 J/mol ? K) A) -22 kJ B) -17 kJ C) 22 kJ D) 17 kJ E) -5.7 kJ