Una maquina termica funciona con el ciclo Otto a 500 msnm. La maquina tiene una relacion de compresion de 10:1 y un volumen de desplazamiento de 4 l. Encuentre
la eficiencia del motor y el trabajo neto por ciclo si la temperatura maxima es de
a) 1000 K, y b) 1500 K.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.