The quantum mechanical model of the hydrogen atom requires that if the principal quantum number is 5, there will be how many different permitted orbital quantum number(s)?
a. two
c. one
b. five
d. four
B
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The buoyant force that keeps a ship afloat is an example of
a. Archimedes' principle. b. Pascal's principle. c. Bernoulli's principle. d. Torricelli's principle. e. none of these principles.
The kinetic energy of a proton is 80% of its total energy. What is the speed of the proton?
A) 0.02c B) 0.87c C) 0.92c. D) 0.98c E) 1.0c
An electric dipole is surrounded by a closed surface with the surface nearer to the negative end of the dipole than the positive end. The flux through the surface is
A. positive. B. negative. C. proportional to the negative charge. D. inversely proportional to the positive charge. E. zero.
Why didn't a planet form in the region of the solar system now occupied by the asteroid belt?
A. It was too cold for a rocky planet to form beyond Mars. B. Orbital resonances with Jupiter disrupted orbits in this region. C. Gravitational encounters with jovian planets kicked most of this material out into the Oort cloud. D. There was never enough material to form a planet.