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A rigid, insulated vessel is divided into two compartments connected by a valve. Initially, one compartment, occupying one third of the total volume, contains air at 500 degrees R, and the other is
A glass fiber reinforced (random orientation) polycarbonate polymer matrix composite has a density of 1.52 g/cm3. The density of E-glass used is 2.58 g/cm3 and that of the polycarbonate is 1.2 g/cm3
Electrical conductivity of stainless steel at room temperature is 0.2 x 107 ?-1 m-1. A 10 foot long piece of stainless steel wire of diameter 60 mil (60x10-3 in.) is subjected to an electric potenti
What is the conversion resolution? Code width? When the inputs are -2.3V and 3.5V respectively, what are the converted digital outputs?
The electrical resistivity of 90wt.% Cu-10wt.% Ni cupronickel alloy at room temperature is 16x10-8?.m. The electrical conductivity of copper at room temperature is 6.0x107(?.m) -1. Densities of Cu a
A mass of 12 kg refrigerant 134a initially exists as a saturated vapor in a piston cylinder device at 240 kpa. Determine work provided by the electrical source.
A well-insulated rigid tank of volume 10 m3 is connected by a valve to a supply line carrying air at 227oC and 10 bar. The tank is initially evacuated. Air is allowed to flow into the tank until the
Sketch the cycle on p-v and T-s coordinates. For each process, associate work and heat transfer with the areas on these diagrams.
Determine the work done in lifting a 250-lb refrigerator 4 ft vertically into a van. Alternatively, the refrigerator could be placed on a cart and rolled up a 10-ft-long ramp.
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.