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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%?
an aircraft has a glide ratio of 12 to 1 meaning the plane drops 1m for every 12m it travels horizontally. a buildng
consider a gas-turbine power plant whose pressure ratio is 8. the isentropic efficiencies of the compressor and the
a crystalline grain of iron in a steel plate is situated in such a way that a tensile stress of 100 mpa 14.5 ksi is
rigid beam abc is supported as shown in figure p4.10. the pin connections at b c and d are each double shear
A volume fraction f = 0.2 of silicon carbide (SiC) particles is combined with an aluminium matrix to make a metal matrix composite. The modulus of particle reinforced composites lies very close to the lower bound of Young's modulus for a composite.
saturated-vapor steam at 2 psia enters a condenser and leaves as saturated-liquid at the same pressure. steam mass flow
an engine operates on an ideal cold air-standard otto cycle with a compression ratio of 8 r v1v2. heat transfer to the
the maximum direct stress and the shear flow distribution near the fixed end - properties of the aluminium
determine the number of vehicles needed to satisfy the indicated deliveries per hour? Assume that availability = 0.90.
power generation using wind energy is reciving increased attention in the united states and worldwide. for a proposed
a formula-1 car encounters a hump which has a circular shape with smooth transitions at either end. a what speed vb
a power plant using steam as the working fluid operates on a rankine cycle. the temperature at the condenser exit is
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