In an isolated system of two bodies that exert gravitational forces on one another, the quantity (quantities) that remain(s) constant is(are)

a. the total energy of the system.
b. the total angular momentum of the system.
c. the angular positions of the two bodies.
d. all of the above.
e. only (a) and (b) above.

e

Physics & Space Science

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Which of the following statements is true about the spin-orbit coupling effects on the transitions of an atom such as sodium? Assume sodium is modeled by a single electron atom

a.The difference in the energy of a split state does not depend on the electron's angular momentum, but instead the angular momentum of the nucleus. b. The differences in energy level transitions are significant enough to change the order of filling of the subshells. c.Electrons with a state of l = 0 never have split energy levels. d. For single electron atoms (or atoms with one electron outside a filled shell) each nl state is made a doublet.

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What are the observational pieces of evidence that confirm the existence of a three-part structure (bulge, disk, halo) to the Milky Way Galaxy?

What will be an ideal response?

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A concave mirror forms a real image at 35.2 cm from the mirror surface along the principal axis. If the corresponding object is at a 12.6-cm distance, what is the mirror's focal length?

a. 22.6 cm b. 47.8 cm c. 10.8 cm d. 9.28 cm e. 19.6 cm

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No net force acts on a loop of wire in a magnetic field when

A) no current is in the loop. B) no magnetic field lines pass through the loop. C) both of these D) neither of these

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