One way we can care for our ear​

Which is not true about oxygen-17 and oxygen-18?

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.

True or false graphs must include scales that increase by the same amount