Based on the law of conservation of energy, which statement is false?

a. energy is lost when machines don’t work right.
b. we can’t add more energy to the universe.
c. we can’t destroy energy that exists in the universe.
d. energy changes from one form to another

Onsider a u-tube whose arms are open to the atmosphere. now, equal volumes of water (ρ = 62.4 lbm/ft3) 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 thus the liquid levels in the two arms are the same. if the fluid height in each arm is 31 in, determine the gage pressure the person exerts on the oil by blowing. (round the final answer to three decimal places.)