A cylindrical surface of radius 43 cm and length 2.4 m maintained at a temperature of 120°C is continuouslyemitting radiations. If the emissivity of the surface is 0.8. (consider: Stefan's constant o = 5.67 x 10-8 W/m²T*)Calculate the rate of heat energy radiated in Watts =A 83.69 gram copper metal is heated to 122°C and dropped into 126.72 gram of water at an initial temperatureof Tw. When equilibrium is reached the temperature of copper-water mixture is 25.2°C. Calculate the initialtemperature of water? If the specific heat of copper is 385 J/kg°C and Specific heat of water is 4186 J/kg°C.Initial temperature of water in (°C) =

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A cylindrical surface of radius 43 cm and length 2.4 m maintained at a temperature of 120°C is continuously emitting radiations. If the emissivity of the surface is 0.8. (consider: Stefan's constant o = 5.67 x 10-8 W/m²T4) Calculate the rate of heat energy radiated in Watts =

A cylindrical surface of radius 43 cm and length 2.4 m maintained at a temperature of 120°C is continuously emitting radiations. If the emissivity of the surface is 0.8. (consider: Stefan's constant o = 5.67 x 10-8 W/m²T4) Calculate the rate of heat energy radiated in Watts =

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 128CP: As the very first rudiment of climatology, estimate the temperature of Earth. Assume it is a perfect...

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Question

A cylindrical surface of radius 43 cm and length 2.4 m maintained at a temperature of 120°C is continuously
emitting radiations. If the emissivity of the surface is 0.8. (consider: Stefan's constant o = 5.67 x 10-8 W/m²T*)
Calculate the rate of heat energy radiated in Watts =
A 83.69 gram copper metal is heated to 122°C and dropped into 126.72 gram of water at an initial temperature
of Tw. When equilibrium is reached the temperature of copper-water mixture is 25.2°C. Calculate the initial
temperature of water? If the specific heat of copper is 385 J/kg°C and Specific heat of water is 4186 J/kg°C.
Initial temperature of water in (°C) =

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