Item 2
What does a photovoltaic cell do?

collects the sun’s energy for heating pools

converts the sun’s energy into electricity

converts electricity into heat for pools

uses pumps and the sun’s energy to heat buildings

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

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

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.