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A cube of side 21 mm is made of a material with thermal conductivity 182 W m-1 K-1, density 1426 kg m-3, and specific heat 2562 J kg-1 K-1. It is exposed to air at 19°C with a convection heat transfer with a coefficient 6 W m K-1. The cube's initial temperature is 169. How long will it take to reach 76°C? (express your answer in seconds to one decimal place, but do not type the unit)

A cube of side 21 mm is made of a material with thermal conductivity 182 W m-1 K-1, density 1426 kg m-3, and specific heat 2562 J kg-1 K-1. It is exposed to air at 19°C with a convection heat transfer with a coefficient 6 W m K-1. The cube's initial temperature is 169. How long will it take to reach 76°C? (express your answer in seconds to one decimal place, but do not type the unit)

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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QUESTION 2 A cube of side 21 mm is made of a material with thermal conductivity 182 W m-1 K-1, density 1426 kg m-3, and specific heat 2562 J kg-1 K-1. It is exposed to air at 19°C with a convection heat transfer with a coefficient 6 W m-² K-1. The cube's initial temperature is 169. How long will it take to reach 76°C? (express your answer in seconds to one decimal place, but do not type the unit)
Transcribed Image Text:QUESTION 2 A cube of side 21 mm is made of a material with thermal conductivity 182 W m-1 K-1, density 1426 kg m-3, and specific heat 2562 J kg-1 K-1. It is exposed to air at 19°C with a convection heat transfer with a coefficient 6 W m-² K-1. The cube's initial temperature is 169. How long will it take to reach 76°C? (express your answer in seconds to one decimal place, but do not type the unit)
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