Gina examines the equations for electric power and ohm's law. she thinks that there is a third equation that can calculate power using only voltage and resistance. which statement best evaluates gina’s idea? it is correct, because i = . it is correct, because i = . it is incorrect, because both equations for power use current. it is incorrect, because ohm’s law does not include i2.

Consider a u-tube whose arms are open to the atmosphere. now equal volumes of water and light oil (ρ = 49.3 lbm/ft3) are poured from different arms. a person blows from the oil side of the u-tube until the contact surface of the two fluids moves to the bottom of the u-tube, and therefore, the liquid levels in the two arms are the same. if the fluid height in each arm is 30 in, determine the gage pressure exerted by the person on the oil by blowing.