For the ground state of the hydrogen atom, which of the following numbers represents the correct value of the magnetic quantum number?
A) 1 B) 2 C) 0 D) -1 E) -2
C
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What does our galaxy look like?
A.) It has a large disk with spiral arms, and is relatively flat and thin. B.) It has clouds of gas and dust in the spiral arms. C.) Older yellow stars are found mostly in the central bulge. D.) Old stars and globular clusters are located in a spherical halo above and below the disk. E.) All of the above
A point charge of 3.00 ?C is located on the y-axis at y = 4.0 m, another point charge of 6.0 ?C is located on the x-axis at x = 5.0 m, and a third charge of 7.2 ?C is located at (5.0 m, 4.0 m). What is the magnitude of the force on the 7.2 ?C charge?
A. 
B. 
C. 
D. 
E. 
Suppose we have a box containing an electron with the lowest possible energy E1. Imagine that we slowly squeeze the box, making its length L smaller. What will happen to the electron’s energy? The electron’s energy will
A. Increase. B. Decrease. C. Remain the same.
If two straight lines start out parallel but eventually cross, then they must be in a
A) flat geometry. B) saddle-shaped geometry. C) spherical geometry. D) spacetime geometry.