Deionized water flows through the inner tube of 30-mm diameter in a thin-walled concentric tube heat exchanger of 0.19-m length . hot process water at 95 c in the annulus formed with the outer tube of 60-mm diameter to 50c . the deionized water is to be heated from 40 to 60 c at a flow rate of 5 kg/s. The thermo physical properties of the fluids are from table (A)considering a paralle-flow configuration of the heat exchanger , determine the flow rate required for the hot process what
(B) determine the overall heat transfer coefficient required for the conditions of part a
(C) considering a counter flow configuration, determine rate of heat transfer

Aheat engine running backward is called a refrigerator if its purpose is to extract heat from a cold reservoir. the same engine running backward is called a heat pump if its purpose is to exhaust warm air into the hot reservoir. heat pumps are widely used for home heating. you can think of a heat pump as a refrigerator that is cooling the already cold outdoors and, with its exhaust heat qh, warming the indoors. perhaps this seems a little silly, but consider the following. electricity can be directly used to heat a home by passing an electric current through a heating coil. this is a direct, 100% conversion of work to heat. that is, 19.0 \rm kw of electric power (generated by doing work at the rate 19.0 kj/s at the power plant) produces heat energy inside the home at a rate of 19.0 kj/s. suppose that the neighbor's home has a heat pump with a coefficient of performance of 4.00, a realistic value. note: with a refrigerator, "what you get" is heat removed. but with a heat pump, "what you get" is heat delivered. so the coefficient of performance of a heat pump is k=qh/win. an average price for electricity is about 40 mj per dollar. a furnace or heat pump will run typically 200 hours per month during the winter. what does one month's heating cost in the home with a 16.0 kw electric heater? what does one month's heating cost in the home of a neighbor who uses a heat pump to provide the same amount of heating?

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?