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A house is maintained at steady state (closed system) at 300 K while the outside temperature is 280 K. The heat loss is measured at 2 kW. Two approaches are being considered: (A) electrical heating at 100% efficiency and (B) a heat pump that operates with a COP equal to 50% of the ideal value. The average daily price of electricity is $0.12/kWh. Determine the cost of options A and B over a 10 hour operating period.
Lane College in Jackson, Tennessee, is considering the conversion of an abandoned church pew manufacturing plant adjacent to the school's campus into a 34,000-square-foot building to house the campus bookstore, a conference center, a small business i..
Model a cup of coffee as a closed system containing 1 lbm of pure water at constant pressure of 14.7 psia. Using your knowledge of the 2nd Law, prove that it would be impossible for coffee at room temperature of 70 °F to heat up to 120 °F by receivin..
calculate the quality of the system to begin with. calculate the amount of liquid water to begin with. calculate the heat transfer during the heating process.
explain the differences between the otto diesel and stirling reciprocating cycles . discuss the application and energy
highways are banked to increase the maximum safe speed at which cars can negotiate a turn. assume a road with radius of
a gas power cycle compresses air at 1 bar and 300 k state 1 through an adiabatic reversible compressor to 6 bar state
Gasoline flows from a 0.25 m diameter pipe in which the pressure is 250 kPa, that contracts into a 0.125 m diameter pipe in which the pressure is 100 kPa. If the pipes are horizontal bad viscous effects are negligible, determine the flow rate (Q). (G..
an astronaut on the planet vimrom iv finds that she can jump a maximum horizontal distance of 13.00 m if her initial
a 50 kg copper block initially at 350 c is quenched in a closed rigid insulated tank containing 120 l of liquid water
air at 20 kpa and 20 degc flows across a flat plate 60 cm long. the free stream velocity is 30 ms and the plate is
A submarine can safely resist 1800 psig. How deep in the ocean can the submarine travel? I found the answer to be 1205 m. Hope fully this is correct. The follow up question is. Calculate the pressure gradient due to gravity in water at 15 C. Express ..
a thin flat plate that is 0.2 m x 0.2 m on a side with rough top and bottom surfaces is placed in a wind tunnel so that
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