A thin steel [ E = 30 , 000 ksi ; v = 0.3 ] plate in a state of plane stress has dimensions of 9.00 in . in the x direction and 3.50 in . in the y direction. The plate increases in length in the x direction by 0.0015 in . and decreases in the y direction by 0.00028 in . Compute the normal stresses σ x and σ y that produced these deformations. Assume that τ x y = 0 .

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

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.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false