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Data for two independent investment opportunities are shown below.
(a) For a ALARR of 8%, should either, both, or neither machine be purchased? Use the annual worth method.
(b) For a ALARR of 8%, should either, both, or neither machine be purchased? Use the present worth method.
(c) What are the payback periods for these machines? Should either, both, or neither machine be purchased, based on the payback periods? The required payback period for investments of this type is three years.
Calculate the ultimate tensile strength (engineering) of a material whose strength coefficient is 700 MPa and a tensile test specimen which necks at an engineering tensile s
Strains measured as the bar was pulled in tension were used to compute Young's modulus. Readings from one gauge gave a modulus much higher than those from the other gauge. W
Determine the change in entropy for 1.0 mole of an ideal gas originally confined to one-half of a 5.0-L container when the gas is allowed to expand to fill the entire containe
Water enters the pump as a saturated liquid at 0.1 bar. The turbine and pump have isentropic efficiencies of 90 and 100%, respectively. Cooling water enters the condenser at
In the off-mode the chip is in thermal equilibrium with the coolant (Ti = T8). When the chip is energized, however, its temperature increases until a new steady-state is est
A geometrically similar compressor is made with a diameter 1.8 times the size of the model and is required to work against a pressure head of 80 mm of water. Determine the o
The following suspension system has two support structures-a spring and a rubber pad. Vertical force F (N) acts on the moveable plate. The spring has a spring constant of k1 =
In an isentropic process a perfect gas expands from 140kPa to 110kPa. If the initial temperature is of the gas is 150 deg C, determine the temperature of the gas at the end of
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