An ideal gas with k = 1.4 is flowing through a nozzle such that the mach number is 1.6 where the flow area is 70 cm2. approximating the flow as isentropic, determine the flow area at the location where the mach number is 0.8. use data from tables. the flow area at the location where the mach number is 0.8 is cm2.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

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