Question

if a person places one end of a solid metal bar into a fire, the end that is not in the fire also gets hot. Which of the following methods of energy transfer does this describe

Answer 1

Answer:

its describe convection

Answer 2

This method of transfer of heat (energy) is called CONDUCTION.

Detailed Discussion:

• Conduction is a method of heat transfer in solid or liquids, which involve the vibrations of the material medium.

• For examples, when we are putting one end of the metal bar into fire, the molecules in the bar vibrate and transfer the heat to the cold end.

• This is seen extensively because the metals are good conductors of heat.

• This transfer of heat can be expressed in the form of heat current.

$\boxed{ \bf \: H = \dfrac{ \theta2 - \theta1}{ \bigg( \dfrac{length}{k \times area} \bigg)} }$

• Here H is heat current, $\Delta\theta$ is temperature difference and k is coefficient.

• Other methods of heat transfers are convection and radiation.

Hope It Helps.