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A consulting firm is contemplating the purchase of a BTU meter to measure the cooling loads on chillers, at a purchase price of $2,000.00. The meter has 10% and 0% salvage values at the end of 5 and 10 years, respectively. It is expected that the meter will generate income at a rate of $500.00 per year. Associated supplies are expected to cost $100.00 per year. The firm's discount rate is 10%. Compute the present worth of this investment for 5 years and for 10 years.
a plant has two identical standby generator units for emergency power use. in the area of the generators the normal
two identical asteroids travel side by side while touching one another. if the asteroids are composed of homogeneous
the 150-lb man lies against the cushion for which the coefficient of static friction is mu s 0.5. determine the
the service life of a battery used in a cardiac pacemaker is assumed to be normally distributed. a random sample of 10
a pressurized tank is nominally at 205 degree c. the density determination must be within 0.5 to be useful. if the
if the atmospheric pressure is 1.025 bar at a location where you can dive in a lake to 30ft below the surface and then
a flashlight is powered for 30 minutes by a 9-v battery supplying power at 0.5 amps.a find the resistance of the
the hot gas supply to a propulsion nozzle is at a pressure of 55kpa and temperature of 800k. the ambient pressure is
the wall of a heat exchanger receives a variable heat flux as shown in the figure. the heat flux is q dot of second
If the unit can perform its function either in State 1 or 2, find the steady-state availability A for the device.
A heat pump with a COP (coefficient of performance) of 2.8 is used to heat an air-tight house. When running, the heat pump consumes 5 kW of power
six kg of steam and ten kg of liquid h2o are sealed in a rigid device with an internal-piston-cylinder. both are at
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