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Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The average heat transfer coefficient on a thin hot
vertical plate suspended in still air can be
determined from observations of the change in
plate temperature with time as it cools. Assume
the plate temperature to be uniform at any instant
of time and radiation heat exchange with the
surroundings negligible. The ambient temperature
is 25°C, the plate has a total surface area of 0.1
m2 and a mass of 4 kg. The specific heat of the
plate material is 2.5 kJ/kgK. The convective heat
transfer coefficient in W/m2K, at the instant when
the plate temperature is 225°C and the change in
plate temperature with time dT/dt = - 0.02 K/s, is
%3D
Transcribed Image Text:The average heat transfer coefficient on a thin hot vertical plate suspended in still air can be determined from observations of the change in plate temperature with time as it cools. Assume the plate temperature to be uniform at any instant of time and radiation heat exchange with the surroundings negligible. The ambient temperature is 25°C, the plate has a total surface area of 0.1 m2 and a mass of 4 kg. The specific heat of the plate material is 2.5 kJ/kgK. The convective heat transfer coefficient in W/m2K, at the instant when the plate temperature is 225°C and the change in plate temperature with time dT/dt = - 0.02 K/s, is %3D
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