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The thermal conductivity parallel to continuous reinforcing fibers in a composite with E-glass in a matrix of polyester is found to be 0.65 W/m.K. The thermal conductivity of E-glass is 0.97 W/m.K a
The breaking strength X [kg] of a certain type of plastic block is normally distributed with a mean of 1500 kg and a standard deviation of 50 kg.
You are an engineer in an electric-generation station. You know that flames in the boiler reach a temp of 1200 K and that cooling water at 300 K is available from a nearby river. What is the max eff
A household refrigerator with a cop of 1.8 removes heat from the refrigerator space at a rate of 90 KJ/min. Determine the electric power consumed by the refrigerator and the rate of heat transfer t
The axel meets specifications as long as it is between 1.32 and 1.39 cm. What is the probability that a randomly chosen axel does not meet specifications?
A supersonic aircraft consumes 5320imperial gallons of kerosene per hour of flight ang flies an average of 14 hours per da.It takes roughly seven tones of crude oil to produce one ton of kerosene.
If the volume of a bucketful of water is described by the normal distribution with a mean of 2.7 gallons and a standard deviation of 0.15 gallons.
A promising method of power generation involves collecting and storing solar energy in large artificial lakes a few meters deep, called solar ponds.
A standard deviation of 4.7 mph, what is the probability that a randomly chosen thunderstorm will have a peak wind speed in excess of 50 mph?
If a light bulb bought from a particular store has a 1.8% probability of being defective when it leaves the store. What is the probability that eight of them purchased at the same time contain exactly
A 1500 lb crate is pulled along the around at a constant speed for a distance of 25ft, using a cable that makes an andle of 15 with the horizontal. Determine the tension in the cable and the work d
Find the velocity of the stream issuing out of the nozzle. The temperature of air leaving the nozzle is 27degree, and its Cp=1.005kj/kg.K
Design a process to produce a 0.5 cm-diameter steel shaft having excellent toughness, yet excellent wear and fatigue resistance.
Water vapor at 6 MPa, 600?C enters an adiabatic turbine operating at steady state and expands to 10 kPa. Determine (a) the isentropic turbine efficiency and (b) the rate of entropy production within t
Determine the concentration of carbon in an iron-carbon alloy for which the microstructure consists of proeutectoid (alpha phase) and pearlite (alpha plus iron carbide) with a mass fraction of 28.6
Determine (a) the temperature of the refrigerant exiting the compressor, in °C (b) the power input to the compressor, kW and (c) the rate of entropy production kW/K.
You are to design and produce a 2 inch thick steel wear plate for a rock-crushing unit. To avoid frequent replacement of the wear plate because of cracking or excessive plastic deformation, the hard
An ideal reheat Rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000 kPa and 450 C; the inlet of the low-pressure turbine at 500 kPa and 500 C; and t
Draw the P-V and T-S diagrams of the cycle and determine (a) p, T and v of the four state points, (b) heat and work quantities for each of the four processes, and (c) the cycle thermal efficiency.
Fine pearlite and a small amount of martensite are found in a quenched 1080 steel. What microstructure would be expected if we had used a low alloy, 0.2% C steel? What microstructure would be expec
The gas may be considered idal at these conditions. Find the final volume and the work for And isothermal process (PC = constant)
Additional heat is added until the pressure reaches 1.2 MPa. How much work is done? What is the final temperature at 1.2 MPa?
A Dam across a river dams up a lake 300 m higher than the river downstream. The electric generators driven by water-powered turbines deliver 1600 MW of power.
The vessel will rupture if the pressure reaches 5 Mpa. What is the initial pressure and quality? What is the temperature in the vessel and the quality just before rupture?
An 8-m long, unisulated square duct of cross sectional 0.2-m x 0.2-m and relative roughness 10^-8 passes through the attic space of a house. Hot air enters the duct at 1 atm and 80 C at a volume flo