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Derive 3-D non-steady state conduction equation in spherical co-ordinates. Explain the assumption involved.
The hot combustion gases of a furnance are divided from the ambient air and its surroundings, which are at 25 oC, by a brick wall 0.15m thick. The brick has a thermal conductivity of 1.2W/mk and a surface emissivity of 0.8 . Under steady state conditions an outer surface temperature of 100 oC is calculated. Free convention heat transfer to the air adjoining the surface is divided by a convection coefficient of 20W/m2k. what is the brick inner surface temperature?
used of Wilson ha rtnell governor
a) A carbide tool with mild steel work piece was found to give life of 2hours while cutting at 50 mpm. Calculate the tool life if the same tool is used at a speed 25% higher than p
Production of hydrochloric acid
Reaction Bonding Such bonding is attained by arranging for two or more components of a compacted body to respond to form both a desired phase and a bond among particles. The r
Compute the total force which shall be acting on the springs: An automobile of mass 1300 kg, travelling at a speed of 60 kmph hits a depression in the road that has a radius o
Gears : A gear is a disc with teeth on its boundary. If these teeth are formed at its inner boundary then this gear is known as an internal gear (annulus). These types of gears ar
Q. What do you mean by Velocity - Area Method? Out of the above four categories, velocity area method is most widely used and provides more accurate results. Requirements of a
Scope of the angle radial drilling machine There are many scope of the angle radial drilling machine like as: we shell produce a hole at any angle with help
Choose a wire rope for a vertical mine hoist to lift a load of 55 kN from a depth of 300 metres. A rope speed of 500 metres/min is to be attained in 10 seconds.
(a) Describe the terms "Refrigeration" and "Air-conditioning". Determine the units of Refrigeration ? (b) The capacity of refrigeration is 400 TR when working between -6 o C and
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