Water at 10 c enters a thin walled aluminum tube with a diameter of 3 cm at a rate of 2 kg/s. the outer surface of the tube is subject to solar radiation at a rate of 300 w/m. find the required length of the tube for the water exit temperature to reach 90 c assuming that 10% of the radiation energy on the tube is lost to the surrounding.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.