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The wall of a large vessel is 50 nun thick and is initially at 12.5°C throughout. A hot fluid al a constant temperature of 500°C is suddenly pumped across the inside surface; the outside surface may be assumed to be perfectly insulated. Using a numerical method, determine the lime taken for the junction of wall and insulation to reach 110°C.
A mass of 2.2 kg of helium at 381 kPa and -253oC is contained is a gas-tight frictionless piston-cylinder. The gas is expanded to a final pressure of 74 kPa in a poly tropic process where n = 1.667. Compute the work done (output positive) in the proc..
a gas turbine power plant produces a net power output of 100 mw with an overall thermal efficency of 35a if the heating
a hypothetical a-b alloy of composition 59 wt b-41 wt a at some temperature is found to consist of mass fractions of
a cylinder whose mass moment of inertia i 12 kg.m2 is rotating at angular velocity of 500 rpm. a constant moment of m
a 4.0 m3 rigid tank contains 3.7 kg of superheated water vapor initially at .20mpa . an electric radiator heating
an aluminum cube initially at 400oc with a dimension of 2 cm on each side is cooled using 30oc air with a convection
consider an air-standard otto cycle and a modified cycle in which the isentropic compression and expansion processes
air enters a compressor at ambient conditions of 100kpa and 17 degc with a low velocity and exits at 1mpa 327 degc and
a refrigerator operates with a coefficient of performance of 4.2 and requires an electrical input of 700 w. if the
To deliver the light, we use an optical fiber. If the fiber is at most 2m long, and we want 99% of the power to be transmitted, what is the maximum attenuation a that the fiber could have
Dry air passes over a flat plate, at the surface of which the water vapor concentration is 0.01 kmol/m3. The plate’s length is 5m (in the direction of airflow) and its width is 1m, and the free-stream velocity of the air is 2 m/s. If both the convect..
image text transcribed for accessibility a black thermocouple is used to measure the internal temperature of a furnace
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