The aluminum rod (E1-75 GPa) is reinforced with the firmly bonded steel tube (E2 = 197 GPa). The diameter ofthe aluminum rod is d = 21 mm and the outside diameter of the steel tube is D = 42 mm. The length of the composite column is L-754 mm. % Matlab input: L = 754 ; d = 21; D = 42; E1 75 ; E2 = 197 ; P 99; A force P is applied at the top surface, distributed across both the rod and tube. Determine the normal stress σ in the aluminum rod when P = 99 kN.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

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.