How are ac and dc generators different?
in dc generators, commutators produce direct current.
in ac generators, no commutators or slip rings are used.
in dc generators, slip rings produce direct current.
in ac generators, commutators produce alternating current.

Let v1, v2, w be three linearly independent vectors in r 3 . that is, they do not all lie on the same plane. for each of the following (infinite) set of vectors, carefully sketch it in r 3 , and determine whether or not it is a vector space (i.e., a subspace of r 3 ). explain your reasoning

What is the angular momentum of the bar about the axle?

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false