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A construction manager just starting in private practice needs a van to carry crew and equipment. She can lease a used van for $3,051 per year, paid at the beginning of each year, in which case maintenance is provide. Alternatively, she can buy a used van for $6,259 and pay for maintenance herself. She expects to keep the van for three years at which time she could sell it for $1,233. What is the most she should pay for uniform annual maintenance to make it worthwhile to buy the van instead of leasing it, if her MARR is 20%?
steam enters a turbine at 12 mpa 550degc and 60 ms and leaves at 20 kpa and 130 ms with a moisture content of 5
when a force is transferred to another point of the body indicate which of the following quantities remain unchanged
A piston-cylinder assembly contains 3 lb of water initially at 95 psi and 350 F. The water undergoes 2 processes in a series. First a constant pressure process and then a constant-volume process. At the end of the constant volume process the temperat..
a small vapor-compression refrigeration unit is to be built into a recreational vehicle and is designed to operate on a
a body with the shape of a rectangular parallelepiped moves without slipping on two cylindrical rollers. the mass os
sketch a system of mass m which is accleerated from rest to a velocity v2 raised to a height of elevation h and cooled
if we need to forecast the life for an element subjected to dynamic load in an internal combustion engine of a vehicle
the u velocity component of a steady two dimensional incompressible flow field is u 4x 3y 1. velocity component v is
a copper-clad steel sheet is produced by hot roll bonding. the cladding separated during deep drawing. what are some
a frictionless piston-cylinder is filled with 3 liters of water at 250 kpa. initially the temperature of the water is
A smooth flat plate, 500mm long in the flow direction and 200mm wide, is maintained at 300K in a parallel flow of 0.1 m/s Refrigerant-134a at 260K. Assuming both plate sides see external flow, determine:
carbon is diffused into steel at 900oc over a period of 10 hrs. the solubility of carbon in steel at this temperature
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