The word " waxing " can replace the first word of which phrase?
a ) cooling temperature
b ) dwindling salaries
c ) increasing support
d ) running out of time

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.