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The City of Brussels is installing a new swimming pool in the municipal recreation centre. Two designs are under consideration, both of which are to be permanent (i.e., lasting forever). The first design is for a reinforced concrete pool which has a first cost of €1 500 000. Even' 10 years the inner surface of the pool would have to be refinished and painted at a cost of €20 0 000. The second design consists of a metal frame and a plastic liner, which would have an initial cost of €50 0 000. For this alternative, the plastic liner must be replaced every 5 years at a cost of €10 0 000, and even" 15 years the metal frame would need replacement at a cost of €15 0 000. Extra insurance of €500 0 per year is required for the plastic liner (to cover repair costs if the liner leaks). The city's cost of long-term funds is 5%. Determine which swimming pool design has the lower present cost.
A Rankine cycle with reheat operates between 20 kpa & 12.5 Mpa with a reheat occurring at 1.2Mpa. Steam enters both the high and low pressure turbine at 500 C, and the enthalpy of steam at the exit of high and low pressure turbines are 3050 and 2600 ..
Assuming a coefficient of static friction equal to 0.2 at the common surface, find the maximum torque that may be transmitted by the flywheel without slippage.
A closed rigid tank contains water in equilibrium at a temperature of 225 °C and a quality of 0.35 (35%). The mass of the liquid water present is 0.25 kg. What phases are present in the system? (Give justification) What is the mass of vapor that is p..
A company produces a certain part whose most important dimension is 37.50 0.025 in. If the tolerance is exceeded, the customer will return the part to the manufacturer at a cost of $200 in rework and replacement expenses.
When on the ground, the car is placed on four individual scales - one under each tire. The four scale readings are 4000 N at A, 3070 N at B, 3100 N at C, and 4660 N at D. Determine the x- and y- coordinates of the mass center G and the mass of the ca..
Saturated Steam is to be condensed on the shell side of a heat exchanger at 75°F. Cooling water enters the tubes at 50°F at a rate of 45 lbm/s and leaves at 65°F. Assuming the heat exchanger to be well-insulated, determine the rate of heat transfer i..
the number of vacancies in a material is related to temperature by an arrhenius equation. if the fraction of lattice
a basketball of mass 0.570 kg is dropped from rest from a height of 1.25 m. it rebounds to a height of 0.734 m. a how
a cylinder fitted with a piston contains 10 lbm of r-134a at 100 psia and 140 degree f. the refrigerant is cooled at
By what percentage n did the builder increase the magnitude of the force exerted on the gutter at A over that figured by the architect? The chain weighs 100 N per meter of its length.
Determine the reactions that are created when the frame is connected to the support and the uniform load is applied to tnember Be praw the shear and moment diagrams and sketch; the deflected shape.
the local atmospheric pressure is 99.0kpa. a gage on an oxygen tank reads a pressure of 300 kpa gage. what is the
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