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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?
(Buoyancy of a floating body) Ice has a density 91.7% of liquid water. For an ice cube (1 cm per side), a) what fraction of the volume floats above the water surface at sta
Sialons Mixture of silicon nitride, aluminium nitride and alumina is hot pressed to acquire a product largely called as sialon. In the resulting product the structure has part
Explain the Application of Electro Chemical Machining? 1. EBM has been used to perforate holes in glass fiber spinning head made from a heat resistant supper alloy. 2. Slott
Working of Reaction turbine: In the impulse turbine the steam is expanded, causing pressure and heat drop in nozzle only and the moving blades only direct the steam through an
Describe vibration and explain different types of vibration. Add following harmonic motions analytically:- X 1 = 4 cos (wt +100) X 2 = 6 sin (wt +600)
Define the Types of Clamping Device Clamping screw. Hook bolt clamp. Lever clamp. a) Bridge clamp. b) Heel clamp. c) Swinging strap clamp. d) Hi
A long hollow cylinder has outer and inner radii 150 mm and 50mm respectively. It create heat at a rate of 1kW/m³ (k= 0.5 W/m ºC). If the maximum temperature obtain at radius of 10
Conventional Priority Rules The standard solution for production scheduling (routing and sequencing) difficulties is the utilization of priority rules. A priority rule is an o
Compare Petrol engine with Diesel engine with each other ( i ) Basic cycle: Petrol Engine work on Otto cycle whereas Diesel Engine work on diesel cycles. ( i i )
The main objective is to compute the maximum efficiency of the solar cell panels, produce hydrogen and estimate the hydrogen production rate using solar cells and electrolyzer and
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