Refrigerant 22 is contained in a closed rigid container with
avolume of 2 ft^3. innitially, the pressure and temperature ofthe
steam is 140 psia and 300 degrees f, respectively. thetemperature
drops as a result of heat transfer to thesurroundings.
determine:
a) the total mass in the container.
b) the temperature at which condensation starts.
c) the fraction of the total mass that has condensed when
thepressure reaches 50 psia.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)