Aline says that the magnetic moment of an atom originates in the orbital angular momentum of the electron. Bevis says that it comes from the electron spin. Which one, if either, is correct, and why?
a. Aline, because only atoms, not electrons, can have angular momentum.
b. Bevis, because only atoms, not electrons, can have angular momentum.
c. Neither, because electron spin and orbital angular momentum always cancel exactly.
d. Neither, because the magnetic moment of an atom comes only from the spin of the nucleus.
e. Both, because both the orbital angular momentum and the spins of the electrons contribute to the magnetic moment of an atom.
e
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The algebraic sum of the changes of potential around any closed circuit loop is
A. zero. B. maximum. C. zero only if there are no sources of emf in the loop. D. maximum if there are no sources of emf in the loop. E. equal to the sum of the currents in the branches of the loop.
One important feature of the Carnot cycle is that it
A. predicts the maximum efficiency of a heat engine operating between two temperatures. B. maximizes the entropy of a heat engine operating between two temperatures. C. specifies the operating temperatures of any heat engine. D. converts all of the heat flowing into an engine to work.
An oxygen atom can bond to ______________ other atom(s)
Fill in the blank(s) with correct word
A mass of 0.40 kg, hanging from a spring with a spring constant of 75.0 N/m, is set into an up-and-down simple harmonic motion. What is the speed of the mass when moving through the equilibrium point? The starting displacement from equilibrium is 0.20 m
a. zero b. 2.7 m/s c. 3.9 m/s d. 3.4 m/s e. 0.55 m/s