A top is set spinning so that the rotation is counterclockwise around its axis when viewed from above. When the top is placed on a level surface it happens that its axis of rotation is not quite vertical. Viewed from above, which way does the rotational axis of the top precess?
a. clockwise
b. counterclockwise
c. It's random, if it starts clockwise it will continue clockwise, and vice versa, i.e., a 50% chance either way.
d. The direction depends on the little shove given to the axis when the top is placed on the surface.
e. In the northern hemisphere it will be clockwise, in the southern hemisphere it will be counterclockwise.
b
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If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a
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That brighter Sirius A weighs 3 solar masses, but the white dwarf Sirius B is only about one solar mass implies:
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a. neutral b. positive c. negative d. polyatomic