Continuous sheet copper is made by electrodeposition from a solution containing CuSO4 onto a rotating drum of lead. For the conditions given below, what should be the rotation speed of the drum (revolution per hour)

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions