The Inner Wall of a Furnace Is at a Temperature

question 7

Multiple Choice

The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and ² 0 cm thick with thermal conductivities of 0.05 and 0.1 W.m^-1 .°C1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m ^-2 .°C^-1 . The rate of heat loss from the outer surface in W.m ^-2 is

• A)165.4
• B)167.5
• C)172.5
• D)175

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Definitions:

Dependent Personality Disorder

A psychological condition characterized by an excessive need to be cared for, leading to submissive and clinging behavior and fears of separation.

Overly Sensitive

Refers to individuals who experience heightened emotional responses to environmental stimuli or social interactions.

Praise To Validate

The act of acknowledging and affirming someone's feelings, actions, or achievements as a method to support and reinforce their value or correctness.

Obsessive-compulsive Disorder

A psychological condition defined by persistent, involuntary thoughts (obsessions) accompanied by or resulting in repetitive actions (compulsions).