Aball is thrown with a speed of 20 m/s at an angle of 40°. which of the
following statements describes the motion of the ball at the top of its
trajectory?
a. the horizontal component of velocity is increasing
b. the vertical component of velocity is zero.
c. the vertical acceleration is zero

d. the horizontal component of velocity is zero

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

Could someone . i have tried to solve myself but my calculation is off

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?