Water enters a heat exchanger at 180 °f, 20 psia and leaves at 160 °f, 19.8 psia. air enters the heat exchanger at 60 °f, 15 psia and leaves at 100 °f, 14.7 psia. the mass flow rate of the water is 40 lbm/min.
a) determine the heat transfer rate, btu/min
b) determine the mass flow rate of air, lbm/min

Noble gases are the most reactive elements on the periodic table. a. true b. false

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

The boiling point of liquids is very high what does it indicate