Air contained in an upright piston/cylinder arrangement is compressed from an initial pressure of 10 atm. and volume of 0.42m^3 to a final pressure of 25 atm. if the atmospheric pressure is 1.013 bar and the cylinder contains 5kg of air, find the final temperature, the work done and the heat transfer if the expansion occurs: isothermally, polytropically with an index of expansion of 1.3, isentropically with γ = 1.4.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature