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A thick oak wall, initially at 25°C, is suddenly exposed to combustion products for which T∞ = 800°C and h = 20 W/m2 · K.
(a) Determine the time of exposure required for the surface to reach the ignition temperature of 400 C.
(b) Plot the temperature distribution T(x) in the medium at t = 325 s. The distribution should extend to a location for which T ≈ 25°C.
Consider the following types of level sensors, and briefly explain the principle of operation of each type in level sensing. Also, what are the limitations of each type?
determine heat rejected per cycle
determine the radius of the crank r and the speed n of a slider crank mechanism used in a shaker table. it is required
a refrigerator operates with a coefficient of performance of 4.2 and requires an electrical input of 700 w. if the
How much heat is required to raise the temperature of 10 pounds of water from 50 degrees fahrenheit to 70 degrees fahrenheit?
determine the position (x,y,0)for fixing cable BA so that the resultant of the forces exerted on the pole is directed along its axis from B toward 0 and has a magnitude of 1kn also, what is magnitude of force f3
Determine the velocity ratios that can be achieved by the gear box in terms of number of teeth in the sun wheel and determine which component (out of the sun wheel, planet carrier and annular wheel) has to be used as the input shaft to get the req..
A thermometer is held vertically in a room with air at 10?C and walls at 27?C. What temperature will the thermometer read if everything can be considered black? State your assumptions.
It is found experimentally that the terminal velocity ut of a spherical particle in a fluid depends upon the diameter d of particle, the dynamic viscosity it of fluid and the buoyancy weight W of the particle [given by the difference in density betwe..
Using an appropriate correlation from Chapter 7, determine the minimum velocity needed to sustain the fuel cell at Tc = 77°C, and the associated location of the wire. The air and large sur- roundings are at Too = Tsur = 27°C and the fuel cell diss..
1 a rigid tank of propane c3h8 with a volume of 1.5 m3 is filled with 8 kg of gas at an initial temperature of 25degc.
an adiabatic pump operating a steady state compresses liquid water from an initial condition of p1 10 bar and t140degc
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