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The purchase price of an instrument is $12,000 and its estimated maintenance costs are $500 for the first year, $1500 for the second and $2500 for the third year. After three years of use the instrument is replaced; it has no salvage value. Compute the present equivalent cost of the instrument using 10% interest.
a) $14,070
b) $15,570
c) $15,730
d) $16,500
wind is blowing on a 55-gallon drum. estimate the wind speed needed to tip the drum over. work in si units. the mass of
A temperature transducer outputs 4 mA of current for 150oF and 20 mA current for temperature of 1oF, then find out Output current value for temperature of 90oF? If the temperature is 70oF, then what is the output current?
a nozzle for a carbon dioxide co2 fire extinguisher is based on the following inlet conditions pressure2500 kpa
The thermal conductivity and diffusivity of the plastic are k = 0.25 W/m · K and a = 1.20 X 10-7 m2/s, respectively.
the diagonal of a long triangular bar 45-45-90 triangle section is well insulated. while sides of equivalent length are
a hot air balloon travels with the wind. the wind velocity is v6i 10j ms for the first hour and then it is 10i 5j ms
An ordinary egg can be approximated as a 5.78 cm diameter sphere. The egg is initially at a temperature of 7.9C and is dropped into boiling water at 97C. Taking the properties of the egg to be p=1020 and cp=3.32. Determine how much heat is transferre..
What is the acceleration of the aircraft (in m/s2)? How long does it take the aircraft to reach its take-off speed?
A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. The air conditioner cycle requires a power input of 0.434 kW and has a coefficient of performance of 6.22.
A bar of mild steel 25 mm diameter twists 2 degrees in a length of 250 mm under a torque of 430 N m. Calculate the values of E, G, K and Poisson's ratio v for the material
Consider the system shown in Fig, if a change of 0.7 kPa in the pressure of air causes the brine-mercury interface in the right column to drop by 5 mm in the brine level in the right column while the pressure in the brine pipe remains constant, de..
Specify the proper fail-safe action for the valves in the following services. Please explain your reasons. A flammable solvent is heated by steam in a heat exchanger. The valve manipulates the flow of the steam to the exchanger
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