Un gas está confinado por un pistón en un cilindro con un diámetro de 0.57 m; sobre el pistón se pone un peso. La
masa del pistón y el peso es de 160 kg. La gravedad es
de 9.817 m/s2 y la presión atmosférica es de 101.79 kPa.
a) ¿cuál es la fuerza en newtons ejercida sobre el gas
por la atmosfera, el pistón y el peso, suponiendo
que no hay fricción entre el cilindro y el pistón?
b) ¿Cuál es la presión del gas en kPa?

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)