It is proposed to have a water heater that consists of an insulated pipe of 8-cm diameter and an electric resistor inside. cold water at 20°c enters the heating section steadily at a rate of 24 l/min. the density and specific heat of water at room temperature are rho = 1000 kg/m3 and c = 4.18 kj/kg·°c.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

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)

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0