Lake erie contains roughly 4.00 ✕ 1011 m3 of water. (a) how much energy is required to raise the temperature of that volume of water from 17.8°c to 21.6°c? (assume the density of this water to be equal to that of water at 20°c and 1 atm.) j (b) how many years would it take to supply this amount of energy by using the 1,400-mw exhaust energy of an electric power plant? yr

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.