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1. Homeowners concerned about interruption of electrical power from their local utility because of weather-related and utility system outages can acquire a standby generator that produces electricity using the home's existing natural gas or liquid propane (LP) fuel source. For a single-family dwelling of your choice, identify a standby generator that would provide electricity during an outage to a set of essential devices and appliances you specify. Summarize your findings in a memorandum including installed-cost and operating-cost data.
2. Despite the promise of nanotechnology (see Horizons in Secs. 1.6 and 2.2), some say it involves risks requiring scrutiny. For instance, the tiny size of nanoparticles may allow them to evade the natural defenses of the human body,and manufacturing at the nanoscale may lead to environmental burdens and excessive energy resource use. Research the risks that accompany widespread production and deployment of nanotechnology. For each risk identified, develop policy recommendations on safeguards for consumers and the environment. Write a report with at least three references.
consider a steam power plant that operates between the pressure limits of 10 mpa and 20 kpa. steam enters the pump as
A fluid at a pressure of 3 bar, and with specific volume of 0.18 m^3/kg, contained in a cylinder behind a piston expands reversibly to a pressure of 0.6 bar according to a law, Pv^2=C, where C is a constant. Calculate the work done by the fluid on th..
Lift coefficient (Cl) and lift (L), An airfoil of surface area 1ft squared is tested for lift (L) in a wind tunnel. At an angle of attack of 5 degrees with standard air of density 0.0024 slugs/ft cube at a speed of 100 ft/sec
saturated r-134a vapor at 100of is condensed at constant pressure to a saturated liquid in a closed piston-cylinder
in a tow stage elongation of specimen the length is first increased from lo to l1 and then from l1 to l2. write down
a vertical hydraulic cylinder has a 125-mm diameter piston with hydraulic fluid inside the cylinder and an ambient
A “Pumpkin Chucker” design for the annual Punpkin Chunkin competition held near Millsboro, Delaware every fall (first week of November) uses a pneumatic launcher (air cannon) to throw its pumpkin. It is important to know if your “ammunition”, the pum..
question1a piston cylinder device contains 25 g of saturated water vapor that is maintained at constant pressure of 300
propane gas enters a continuous adiabatic heat exchanger at 40degc and 250 kpa and exits at 240degc superheated steam
Evaluate the valve closure to achieve a water exit velocity
A ball is dropped inside an evacuated tube so that there is no aerodynamic drag acting on the ball. At one point it is at a height of 2.5 m and is dropping at a speed of 1.0 m/s. What will be the height of the ball when its speed is 5.0 m/s? Take g= ..
Water is pumped from a lake at ambient pressure and temperature to an elevation of 15 m through a pipe of 2-cm diameter galvanized iron at a flow rate of 0.00366 m3 /s. Assume the discharge is to open atmosphere. The pipe is 70 m long and has 2- 90o ..
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