Engineering, 19.07.2019 03:30 raeleemae

Which coal type has the highest carbon content and is geologically the oldest? (a) anthracite (b) bituminous (c) subbituminous (d) lignite (e) peat.

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Engineering, 04.07.2019 19:10, Lexi5170

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Engineering, 04.07.2019 19:20, diawia

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Engineering, 06.07.2019 04:10, kathiewallentin1767

Steam enters a converging-diverging nozzle at 1.0 mpa and 500°c with a negligible velocity at a mass flow rate of 2.5 kg/s, and it exits at a pressure of 200 kpa. assuming the flow through the nozzle to be isentropic, determine: the exit area and (a) (b) the exit mach number

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Engineering, 06.07.2019 04:10, idjfjcjs584

Along steel shaft of 10 cm diameter is austenised at 870°c and then quenched in a liquid at 30oc. the average surface heat transfer coefficient is 2000 w/m2. °c. the relevant thermophysical properties of the shaft are: p=7800 kg/m", k=20 w/mk, cp=0.46 kj/kg. k calculate: a)-the time required for the center temperature to drop to 200°c. b)-the temperature at half-radius at that moment. c)-the amount of heat that had been transferred to the liquid by that time per meter length of the shaft

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Which coal type has the highest carbon content and is geologically the oldest? (a) anthracite (b) b...