What is the advantage to using non-linear visual aids during a presentation?
a. they require a darkened the room, which causes the audience to pay more attention.
b. they may require additional work transporting and replacing worn objects.
c. they increase audience participation through close observation.

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?