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Your neighbor lives in a 2500-square-foot (about 250 m2) older house heated by natural gas. The current gas heater was installed in the early 1970s and has an efficiency (called the Annual Fuel Utilization Efficiency rating, or AFUE) of 65 percent. It is time to replace the furnace, and the neighbor is trying to decide between a conventional furnace that has an efficiency of 80 percent and costs $1500 and a highefficiency furnace that has an efficiency of 95 percent and costs $2500. Your neighbor offered to pay you $100 if you help him make the right decision. Considering the weather data, typical heating loads, and the price of natural gas in your area, make a recommendation to your neighbor based on a convincing economic analysis.
argon enters an insulated nozzle at 277 kpa 1300 k 10 ms and exits at 100 kpa 645 ms. for steady-state operation
A cutting tool on a lathe applies a tangential force of 3.5 kN when it is machining a bar 150 mm in diameter. If the lath is turning at 100 rpm, what power is being supplied to the bar?
Show that eventually the person's capital grows at 20% per annum.
Disregarding the weight of the beam, calculate the required width b of the rectangular cross section.
estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation
where k is the coefficient of kinetic friction between the blocks and the ground. Also, what is the distance the blocks slide on the surface before they separate?
Define an anonymous function for the following function. The anonymous function takes three inputs: x, a, and b. Make a plot of the function for x = 0 to 5. Use a = 2 and b = 2. f(x)=(x/a)-sin^b x (2) Repeat the above task with an inline function.
An isolated system consists of a closed copper vessel of mass 0.1 kg, containing 1 kg of liquid water, each initially at 5°C, immersed in 20 kg of liquid water, initially at 20°C. The system is allowed to come to equilibrium. Determine the final temp..
Determine the approach used to find maximum inside diameter of the tubes in a novel combustor design for use in lean premixed gas turbine, which are intended to prevent flashback
The force of gravity on an imaginary Earth-mass planet - When the two balls are separated horizontally by 5.0 cm, the string hangs
Define the term analysis as used in computer aided design in mechanical engineering
Determine the flow rate of steam from the boiler in lb/h
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