What is the mode of heat transfer by which heat flows from a hotter to a colder substance through physical contact?

What is the mode of heat transfer by which heat flows from a hotter to a colder substance through physical contact?

• A. Conduction
• B. Convection
• C. Radiation
• D. Compression

Answer: (A)

The mode of heat transfer where heat flows from a hotter substance to a colder one through physical contact is known as conduction. This process occurs when particles in the hotter substance vibrate or move more rapidly, transferring their kinetic energy to neighboring particles in the colder substance upon contact. This transfer continues until thermal equilibrium is reached, meaning the temperatures of the two substances equalize. Conduction is a critical concept in various engineering applications, especially in metallurgy and thermal engineering, as it helps in the design of systems that involve heat exchange, such as heat exchangers and thermal insulation. Understanding conduction is essential in predicting how materials will behave in different thermal environments, ensuring safety and efficiency in mechanical systems.

The mode of heat transfer where heat flows from a hotter substance to a colder one through physical contact is known as conduction. This process occurs when particles in the hotter substance vibrate or move more rapidly, transferring their kinetic energy to neighboring particles in the colder substance upon contact. This transfer continues until thermal equilibrium is reached, meaning the temperatures of the two substances equalize.

Conduction is a critical concept in various engineering applications, especially in metallurgy and thermal engineering, as it helps in the design of systems that involve heat exchange, such as heat exchangers and thermal insulation. Understanding conduction is essential in predicting how materials will behave in different thermal environments, ensuring safety and efficiency in mechanical systems.