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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?
(a) Show that for an adiabatic process Pv r = C, holds good. (b) One Kg of a contain gas is at 0.11 KPa and 15 o C. It is compressed until its volume a 0.1m 3 . if the compress
Submerged Arc Welding Single pass filler welds upto (8.0 mm) maximum and groove welds made with a single pass or a single pass each side, may be made using an E7os-x elect
The Bronzes The coinage bronze employed for making coins in earlier days contains 95% copper, 4% Sn and 1 % Zn. The Zn acts as a deoxidizer. Such alloy is soft and ductile.
A nozzle of 50 mm. dia. delivers a stream of water that strikes a flat plate which is held normal to the axis of stream. If the issuing jet has a velocity of 15 m/sec., Determin
what is dry ness fraction?
Newton's first law of motion: First law of Newton: It is magnitude of force that develops acceleration of 1 m/s2 in 1 kg mass of the body. The subject of rigid body mecha
steady state amplitude
WELDING PROCEDURE AND PERFORMANCE QUALIFICATION A total quality assurance scheme, embracing all aspects of manufacture would have necessarily made all attempts to ensure
Find out the mechanical advantage of the machines: A lifting machine may lift 800 N by the application of 100 N. Distance moved by the effort is 100 cm. At the same time load
why we feel increase in weight when elevator goes up?
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