//(4.13)  An air compressor rapidly fills a .28m3 tank, initially containing air at 21C, 1 bar, with air drawn from the atmosphere at 21C, 1 bar. During filling, the relationship between the pressure and specific volume of the air in the tank is pv^1.4 = constant. The ideal gas model applies for the air, and kinetic and potential energy effects are negligible. Plot the pressure, in atm, and the temperature, in F, of the air within the tank, each versus the ratio m/m1, where m1 is the initial mass in the tank and m is the mass in the tank at time t > 0. Also, plot the compressor work input, in kJ, versus m/m1. Let m/m1 vary from 1 to 3.



//solution
printf('its an IT software problem')