a mass m slides under the action of gravity inside a frictionless tube which is bent in the shape of a helix of radius a and pitch angle α. 34 kinematics: the description of motion the geometric axis of the helix is vertical. if the mass starts from rest at t = 0 from the point z-0 and φ = 0, find the er, e and ez components of the force exerted by the particle on the helix as a function of time

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

What are the north and south poles of a solenoid change with?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?