A car is accelerating down a slope. What are the changes in kinetic energy and gravitational potential energy as it is moving down the slope? A .Kinetic energy increases as gravitational potential energy decreases.
B. Kinetic energy decreases as gravitational potential energy increases.
C. Kinetic energy increases as gravitational potential energy increases.
D. Kinetic energy decreases as gravitational potential energy decreases.

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.