How long will it take for a 1.5A current to coat evenly a layer of copper 0.1mm thick on both sides of a 12cm×12cm copper plate. (e. c.e o copper=0.00033/g/c, density of copper=9gcm^3)

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Can anybody me with this? ? (picture included.)

Ineed the answer to question 1 , i’m desperate