Heat Transfer

Question 1

Types of heat transfers

Answer 1

Conduction, convection, radiation

Question 2

What is conduction

Answer 2

-Particles that are very close together can transfer heat energy as they vibrate
- The ions are packed closely together and they vibrate continually
- The hotter the metal, the more kinetic energy these vibrations have
- This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons

Question 3

What is convection

Answer 3

• Warmer regions of a fluid are more dense than cooler regions of the same fluid
• The warmer regions will rise because they are more dense
• The cooler regions will sink as they are less dense

Question 4

What is radiation

Answer 4

• Heat can move by travelling as infrared waves.
• These are electromagnetic waves, like light waves, but with a longer wavelength.
• Infrared waves are heat objects that absorb them and are also known as thermal radiation.