Air at 27°c and latm flows over a plate at a speed of 2m/s. calculate the boundary layer thickness at distances of 20cm and 40cm from the leading edge of the plate. calculate the mass flow which enters the boundary layer between x = 20cm and x = 40cm. the viscosity of air at 27°c is 1.85 x 105 kg/m. s. assume unit depth in the z-direction.

On a average work day more than work place firs are reorted

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.