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An energy efficiency project has a first cost of $300,000, a life of 10 years, and no salvage value. Assume that the interest rate is 9%. The most likely value for annual savings is $60,000. The optimistic value for annual savings is $80,000 with a probability of 0.2. The pessimistic value is $40,000 with a probability of 0.3.
a) What is the expected annual savings? b) The expected PW? c) Compute the PW for the pessimistic? d) Most likely? e) and optimistic estimates of the annual savings?
Define flow at a hydraulic jump (upstream and downstream) in terms of the types of flow and corresponding Froude number. What is the depth of water at each section (upstream and downstream) compared to critical depth
Design a simple horizontal curve to connect two roadway tangents that deflect at an angle chosen between 50 and 75 degrees. Assign a station to the curve PI and select a curvature of 6 degrees.
A 1m diameter pipe bend is carrying water with a steady flow rate of 2 m3/s. The bend has an angle of 90o and lies in a horizontal plane. The volume of water in the bend is 1.5 m3 and the empty weight of the bend is 4 kN.
You have been hired to do a survey to search for old tunnels that are rumored to be in the area, previously used to smuggle people across the US-Mexico border. The tunnels are not expected to be exceptionally deep underground.
The cylinder B is released from rest. Determine the speed of both masses (vA and vB) after B moves by h m. Also calculate the angular displacement for the pulley D. The diameter of the pulley D is 0.2 m. Neglect all friction.
A new development is to be constructed in Mexico City. Due to the large subsidence, the elevation at the proposed site must be raised prior to construction. The total volume of soil needed to raise the site is 100,000 cubic yards.
The engine of an automobile supplies 180 hp at 2500 rpm to the drive shaft. If the maximum shearing stress in the drive shaft must be limited to 6 ksi, determine the minimum diameter required (in inches) for a solid drive shaft.
A quartzite sample in a compression testing machine is 180mm long and 54mm in diameter. what is the stress under a load of 100kN? if the modulus of elasticity is 102kN/mm2, find the strain develope in the sample.
A 30-liter volume of gas at 25 degrees C contains 12 g of methane (CH4), 1 g of nitrogen (N2), and 15 g of carbon dioxide (CO2). Calculate (a) the moles of each gas present, (b) the partial pressure exerted by each gas, and (c) the total pressure ..
If the queue clears exactly at the end of the effective green D/D/1 queuing applies, determine the total vehicle delay in the cycle (in veh-sec) .
A substance for which k is a constant undergoes an isothermal, mechanically reversible process from initial state(P1-->V1) to (P2-->V2), where V is a molar volume. a) Starting with the definition of k, show that the path of the process is described
The chemical 1,4-dichlorobenzene (1,4-DCB) is sometimes used as a disinfectant in public lavatories. At 20°C (68°F) the vapor pressure is 5.3 × 10-4 atm. (a) What would be the maximum concentration in the air in units of g/m3
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