Question

heat transfer through direct contact is called...

select one:
a. conduction
b. convection
c. radiation
d. filtration

Explanation:

Define heat transfer mechanisms

Heat transfer occurs via three primary mechanisms: conduction, convection, and radiation.

Analyze direct contact

Conduction is the transfer of thermal energy between neighboring molecules in a substance due to a temperature gradient, requiring direct physical contact.

Evaluate the options

• Conduction: Heat transfer via direct contact.
• Convection: Heat transfer via fluid movement.
• Radiation: Heat transfer via electromagnetic waves.
• Filtration: A physical separation method, not a heat transfer mechanism.

Answer:

• a. Conduction (Correct answer)
• b. Convection
• c. Radiation
• d. Filtration