At motorway speeds, about half of the power generated by a car's engine is used to overcome aerodynamic drag, thus the fuel consumption is nearly proportional to drag force on a level road. Determine the percentage increase in fuel consumption of a car per unit time when a person who normally drives at 90 km/h starts driving at 120 km/h.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.