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Your town has a proposal to install solar panels on the roof of the combined City Hall - Police Station - Fire Station building. Using Benefit-Cost analysis, should the city accept this proposal?
You are offered a zero coupon bond worth $10,000 in face value 20 years from now. What price would you be willing to pay for this bond today?
What is your monthly payment? What is your yearly loan payment? What is your yearly depreciation? What is the book value of the property at the end of ten years?
Neglecting calculations for depreciation or trade-in-value, should you drive the truck you have for another 7 years, or buy the new truck?
Find the velocity, U2, in the inviscid central core at the second section, and the pressure drop between the two sections.
In a steam generator, compressed liquid water at 1500 psi, 100oF, enters a 1-in diameter tube at the rate of 5 ft3/min. Steam at 1250 psi, 750oF exits the tube.
The film coefficient between the bar surface and the ambient air is 7.5 W/m^2K. Using a node spacing of 0.5 m, estimate the steady state temperature at the middle of the bar.
Estimate the surface temperature of the pod when suspended in a bay where the current is 1 m/s and the water temperature is 15oC.
Determine the maximum temperature that the lake could freeze at a clear sky night. Assume the lake is a blackbody and the effective sky temperature is 243K.
The currently used material is brass, but you have decided to make it from a wrought magnesium alloy. What would be the ratio of costs for the two rods? What would be the ratio of weights?
If the material has a yield strength of Sy= 40 kpsi, find safety design factor for (a) maximum shear stress theory criterion, and (b) von mises theory.
Air enters a heating section at 1 atm, 15°C, and 30 percent relative humidity at a rate of 4 m3/min. Determine (a) the rate of heat transfer in the heating section and (b) the relative humidity of
A spur pinion, d = 100 mm, has a torque of 225 Nm applied to it. For pressure angle of 20 degree. Indicate the percentage change of W's when pressure angle increased to 25 degree or re
Determine a) the fraction of the total incident solar radiation that is absorbed by the fresh snow, and b) if convection and re-radiation are neglected and if the snow is at 0C, the rate of melting
A gear train is to have a speed reduction of 600:1. The gears used can have no fewer than 12 teeth and no more than 96 teeth. How many teeth should be in each gear in the gear train?
The hailstones were nearly spherical, with a diameter of roughly 3.7 cm and a weight of 24 g. What is the kinetic energy of this hailstone when it impacts the roof?
What is the fundamental theoretical difference affecting overall thermal efficiency between a carnot cycle process and an ideal cycle process (such as a Diesel or Otto cycle)?
Indicate the percentage change of W's when pressure angle increased to 25 degree or reduced to 14.5 degree? What is your conclusion?
What are azeotropic and non azeotropic mixtures? Explain in brief, their advantages giving examples? Determine the evaporator temperature at which a single-stage R22 plant
The temperature limits of the cycle are 40 degree C and 0 degree C. determine the pressure, volume and temperature at each point of the cycle.
If I open the valve and cause the ideal gas to expand into the other side of the box, what is the change in internal energy of the air as it fills the entire volume if I assume that air is an ideal
Calculate the coefficient of performance of a Carnot heat pump cycle operating between thermal reservoirs at 20 and 5°C
Consider a viscoelastic polymer rod that is stretched from 100 mm to 165 mm by a stress of 3.35 MPa. What is the modulus of elasticity (relaxation modulus) when the stress is reduced by 1/2?
Write down the balanced chemical equation for one lbmol of ethane (b) Find the heat transfer in Btu per lbmol of ethane.
The force (weight) from a hanging sign attached at the outer tip of the top rail (P)? What will the tension be if a 50lb sign is hung at the tip of the bracket?