Why does gravity pull things with mass toward it?

Awalk up the phase change graph worksheet

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.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects