A 50 KW electric furnace measure 1.2m x 1.0m x 0.8m. When the temperature inside the furnace is 1520 oC, a block of aluminum with a mass of 300kg and a temperature of 16.5oC is placed inside. Assuming the heat loss from the furnace walls is 500 Watts per m2, how long will it take to heat the aluminum block to the furnace temperature? Assume that the specific heat of aluminum is 0.9 KJ/kg-K. 2. A hollow cylinder with one end closed 1.0m in diameter and 2.0m long weighs 3285N. How many KN of lead weighing 110 KN/m³ must be placed inside the cylinder tomake it float with 0.5m above the water surface?3. A 50 KW electric furnace measure 1.2m x 1.0m x 0.8m. When the temperature insidethe furnace is 1520 °C, a block of aluminum with a mass of 300kg and a temperatureof 16.5°C is placed inside. Assuming the heat loss from the furnace walls is 500Watts per m², how long will it take to heat the aluminum block to the furnacetemperature? Assume that the specific heat of aluminum is 0.9 KJ/kg-K.

given; electric power (P)=50kwfurnace dimension=1.2m*1m*0.8mtemperature inside the furnace…

Answered: A 50 KW electric furnace measure 1.2m x…

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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A 50 KW electric furnace measure 1.2m x 1.0m x 0.8m. When the temperature inside
the furnace is 1520 oC, a block of aluminum with a mass of 300kg and a temperature
of 16.5oC is placed inside. Assuming the heat loss from the furnace walls is 500
Watts per m2
, how long will it take to heat the aluminum block to the furnace
temperature? Assume that the specific heat of aluminum is 0.9 KJ/kg-K.

2. A hollow cylinder with one end closed 1.0m in diameter and 2.0m long weighs 3285
N. How many KN of lead weighing 110 KN/m³ must be placed inside the cylinder to
make it float with 0.5m above the water surface?
3. A 50 KW electric furnace measure 1.2m x 1.0m x 0.8m. When the temperature inside
the furnace is 1520 °C, a block of aluminum with a mass of 300kg and a temperature
of 16.5°C is placed inside. Assuming the heat loss from the furnace walls is 500
Watts per m², how long will it take to heat the aluminum block to the furnace
temperature? Assume that the specific heat of aluminum is 0.9 KJ/kg-K.

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