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

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

im doing test rn im going with 2 but ill give answer if itss wrong,   : )

window cleaner is ammonia dissolved in water. this is an example of a