In a completely filled atomic shell,

a. the intrinsic spin of the electrons does not produce a resultant magnetic moment.
b. the orbital motion of the electrons does not produce a resultant magnetic moment.
c. the atom will be an alkali metal.
d. only (a) and (b) are correct.
e. none of the above are correct.


d

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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Friction: A driver in a 1000-kg car traveling at 24 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the level road is 0.80, how long will the skid marks be?

A. 37 m B. 30 m C. 46 m D. 34 m

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When we see that a spectral line of a galaxy is broadened, that is, spanning a range of wavelengths, we conclude that

A) we do not have very good resolution of a star's orbital velocity. B) there are many stars traveling at extremely high orbital velocities. C) there are different Doppler shifts among the individual stars in the galaxy. D) we are actually measuring the orbital velocity of a cloud of atomic gas. E) we are actually measuring the orbital velocity of dark matter.

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