A roofing shingle elevator is lifting a 30.0-kg package to the top of a building at constant speed. The angle between the elevator track and the horizontal is 75∘. The power of the elevator is 800 W. Part A Determine the vertical component of the speed with which the package is moving up. Assume no friction is exerted by the incline surface on the package.

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

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance

How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?