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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
a wall has inner and outer surface temperatures of 16c and 6c respectively. the interior and exterior air temperatures
Trying to find a solution for problem 2.33 in Fundamentals of Heat and Mass Transfer, seventh edition.
Application: Parallel plate resonator. A parallel plate waveguide is shorted at two locations as shown in Figure 17.32. The distance between shorts is d. Calculate the resonant frequencies of the shorted guide, assuming that a TM mode exists in th..
the performance of a device is defined as the ratio of the desired output to the required input and this definition can
The Take Off Roll data must be interpolated/extrapolated across pressures (vertically in the table) only; across-temperature interpolations (horizontally) will produce erroneous results. For the Rate of Climb data, interpolation/extrapolation is t..
---a heat engine operates between two heat reservoirs with temperature of 560 and 280 k. the thermal efficiency of the
Determine the bending moment M in the pinned-end column with eccentric axial loads shown in the figure. Then plot the bending-moment diagram for an axial load P= 0.3Pcr.
all makers of beverages such as breweries wineries and soda makers must wash bottles before filling. a new beverage
In a heating system, cold outdoor air at 4°C flowing at a rate of 4 kg/min is mixed adiabatically with heated air at 61°C flowing at a rate of 2 kg/min. Calculate the exit temperature of the mixture. Report your answer in [°C] and round your answer t..
if an object has a density of 17 slugsft3 what is its density in si units and would it be able to float?if the maximum
The spring is compressed to solid length by tightening the nut with a power wrench. The trigger pin is inserted through the bottom cap and into the groove to secure the gun in the loaded position. The nut is then backed up all the way and the trig..
The automobile bumper jack is designed to support a 4000-N downward load. Begin with a free-body diagram ofBCDand determine the force supported by rollerC.Note that rollerBdoes not contact the vertical column.
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