12.18 WEY The performance characteristics of a certain centrifu- gal pump having a 9-in.-diameter impeller and operating at 1750 rpm are determined using an experimental setup similar to that shown in Fig. 12.10. The following data were obtained during a series of tests in which z₂z₁ = 0, V₂ = V₁, and the fluid was water. - 21 Q (gpm) 20 40 60 80 100 120 140 P2 - P₁ (psi) 40.2 40.1 38.1 36.2 33.5 30.1 25.8 Power input (hp) 1.58 2.27 2.67 2.95 3.19 3.49 4.00 Based on these data, show or plot how the actual head rise, ha, and the pump efficiency, n, vary with the flowrate. What is the design flowrate for this pump?

A hot water leak in one of the faucets of your apartment can be very wasteful. A continuous leak of one quart per hour​ (a "slow"​ leak) at 155 degrees°F causes a loss of 1.81 million Btu per year. Suppose your water is heated with electricity. a. How many pounds of coal delivered to your electric utility does this leak equate to if one pound of coal contains 12,000 Btu and the boiler combustion process and water distribution system have an overall efficiency of 28​%? b. If a pound of coal produces 1.81 pounds of CO2 during the combustion​ process, how much extra carbon dioxide does the leaky faucet produce in a​ year

Suppose you are considering buying a toyota prius, which starts ag 25,000$ and gegs 50 mpg. a similarly equipped Honda Accord will start ag $22,000 but will get 31 mpg.   a) How many miles will it take the Prius to recoup the price difference?   b.) Assuming you drive 1,000 miles per momth, how many years will it take you to recoup the price difference?