Chapter 4, Problem 79P

Calculate the forces in members BC, BG & FG of the truss shown using the Method of Sections. For your answer, provide atruss diagram of the calculated member forces and indicate whether the member is in Tension (+) or Compression (-)

Select the speed, feed and depth of the cut to turn wrought, low carbon steel (hardness of 200 BHN) on lathe with AISI tool material of HSS M2 or M3. (Hint: refer to Chapter 21 for recommended parameters).

Only question 1&2

Only question 3&4

The enthalpy of fusion for water is 6.01 kJ/mol. Calculate the entropy change for 1.0 mole of ice melting to form liquid at 273 K

Calculate the entropy change for 1.00 mol of an ideal gas expanding isothermally from a volume of 24.4 L to 48.8 L.

Determine the endurance limit.

Water enters an adiabatic nozzle steadily at 500 kPa and 300˚C with a mass flow rate of 6000 kg/h and leaves at 100 kPa and 45 m/s. The inlet area of the nozzle is 40 cm2. Take the Cp of CO2 to be 4.2 kJ/kgK and the specific volume of water to 0.001 m3/kg. Determine the inlet velocity and the exit temperature.

Water enters the constant 130 mm inside-diameter tubes of a boiler at 7 MPa and 65˚C and leaves the tubes at 6 MPa and 450˚C with a velocity of 80 m/s. Calculate the velocity of the water at the tube inlet and the inlet volume flow rate. Hint: the mass flow rate remains constant.