Basic question about energy transfer

In summary, the metal spoon inside the saucepan gets hot because it is a good conductor of thermal energy, while the wooden handle remains cool due to its low thermal conductivity. The transfer of energy occurs through conduction, convection, and radiation, with the water in the saucepan also playing a role through evaporation. The different densities and thermal conductivities of wood and metal, as well as the vibrating particles, contribute to the unequal heating of the two materials.
  • #1
parmi38
1
0

Homework Statement



During a food lesson, some students wonder why the metal spoon inside the saucepan gets hot but the wooden handle does not. Explain how the energy is transferred from the cooker to the end of the metal spoon (and why the wood doesn't get hot). There is water in the saucepan. And the saucepan is metal with a black coating.

Key words to use are:
Conduction, conductor, convection, energy transfer, evaporation, heating, insulator, metal, particles, radiation, thermal, vibrate, water, wood and density.


The Attempt at a Solution



I know the basics but I am struggling to use all of the key words. My rough answer so far is something along the lines of wood is an insulator, metal is a conductor, so (thermal?) energy can be transferred. Particles become less dense taking up more room (convection) [how does this transfer energy?).

And that is about it so far. Please just leave some key points. Thanks
 
Physics news on Phys.org
  • #3
I would familiarize yourself with heat transfer terms such as conduction, convection and radiation.

The spoon is being heated via conduction but the handle is cooling because of convection and radiation. Water is evaporating from the sauce pan. Wood has a different thermal conductivity than metal. Atoms are vibrating at different rates.
 

Related to Basic question about energy transfer

1. What is energy transfer?

Energy transfer is the process of moving energy from one place to another or converting it from one form to another.

2. What are the different types of energy transfer?

The main types of energy transfer are conduction, convection, and radiation. Conduction is the transfer of heat through direct contact, convection is the transfer of heat through the movement of fluids, and radiation is the transfer of heat through electromagnetic waves.

3. What is the law of conservation of energy?

The law of conservation of energy states that energy cannot be created or destroyed, only transferred or transformed. This means that the total amount of energy in a closed system remains constant.

4. How does energy transfer affect the environment?

Energy transfer can have various effects on the environment depending on the source of the energy and the method of transfer. For example, the burning of fossil fuels for energy can contribute to air pollution and climate change, while renewable energy sources such as solar and wind have less impact on the environment.

5. How can we increase the efficiency of energy transfer?

There are several ways to increase the efficiency of energy transfer, such as using insulation to reduce heat loss, using more efficient technologies, and reducing energy waste. Additionally, using renewable energy sources can also increase the efficiency of energy transfer as they have less energy loss compared to traditional sources.

Similar threads

  • Introductory Physics Homework Help
2
Replies
38
Views
4K
  • Introductory Physics Homework Help
Replies
14
Views
3K
Replies
34
Views
2K
  • Introductory Physics Homework Help
Replies
15
Views
3K
  • Introductory Physics Homework Help
Replies
4
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
21
Views
3K
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
3
Views
7K
  • Mechanical Engineering
Replies
1
Views
1K
Back
Top