Arigid 3-ft3 vessel contains r-134a originally at –20°f and 27.7 percent quality. the refrigerant is then heated until its temperature is 100°f. calculate the heat transfer required to do this. use data from the refrigerant tables.

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve