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
You might also like to view...
Neglecting air resistance, how fast must you toss a ball straight up in order for it to take 6 seconds to return to its initial level?
A) 5 m/s B) 10 m/s C) 20 m/s D) 30 m/s E) more than 30 m/s
That brighter Sirius A weighs 3 solar masses, but the white dwarf Sirius B is only about one solar mass implies:
A) that white dwarfs evolve slower than main sequence stars. B) that the collapsed companion transferred mass to Sirius A. C) that there should be a planetary nebula around the Sirius system. D) that Sirius A will be stable three times longer than Sirius B. E) the Sirius A will end up as a black hole, not a white dwarf like its companion.
If an electron vibrates up and down 1000 times each second, it generates an electromagnetic wave having a
A) period of 1000 s. B) speed of 1000 m/s. C) wavelength of 1000 m. D) frequency of 1000 Hz. E) wavelength of 1000 km.
An atom that has equal amounts of protons and electrons is a ______________ ion
a. neutral b. positive c. negative d. polyatomic