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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.
a boy tosses a ball in the vertical direction off the side of a cliff. if the initial velocity of the ball is 15ms
A separate air stream passes in counterflow to the Refrigerant 134a stream, entering at 1208F and exiting at 778F. The outside of the heat exchanger is well insulated. Neglecting kinetic and potential energy effects and modeling the air as an idea..
can the flow field given by v 1x2 i - 2 x 1y j represents a steady and incompressible two dimensional flow?a if yes
a heavy ball with a weight of 130 n is hung from the ceiling of a lecture hall on a 4.0-rm m-long rope. the ball is
What is the change in enthalpy (in kJ/kg) of oxygen as its temperature changes from 29°C to 181°C? Assume an ideal gas with R = 0.2598 kJ/kg-K and a ratio of specific heats of 1.4.
How to calculate the force required to displace the Bellow for 10mm which is fixed in the pipe line. It is a ring type bellow and i want to find axial force.
If a single deposit of $25000 is invested at 1.75% yearly interest, what equal year-end withdrawals can be made each year for 10 years, leaving nothing in the fund after the 10th withdrawal? How much money was made in interest over the initial invest..
A rigid tank contains 5 kg of an ideal gas at atm and 40° C. Now valve is open, and half of mass of the gas is allowed to escape. If the final pressure in the tank is 1.5 atm, what is the final temperature in the tank?
the 90-kg man dives from the 40-kg canoe. the velocity indicated in the figure is that of the man relative to the canoe
A material is required for a cheap column with a solid circular cross-section that must support a load F* without buckling. It is to have a height L . Write down an equation for the material cost of the column in terms of its dimensions, the price pe..
helium gas in an ideal otto cycle is compressed from 12c and 2l to 0.25l and its temperature increases by an additional
air at 101 kpa and 21 degree c dry bulb and 60 percent relative humidity enters an industrial dryer and is discharged
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