A thermo flask is used at home to keep hot substances hot and cold substances cold.Help your grandfather by drawing its structure and show how each part is able to minimise heat losses

Answer 1

Sure! I can help you with that. Here's a simple drawing of a thermo flask and an explanation of its parts:

1. Outer Shell: The outer shell of the thermo flask is usually made of plastic or stainless steel. It acts as a protective layer and is able to minimize heat losses through conduction and radiation. The material used in the outer shell is a poor conductor of heat, reducing the transfer of heat from the environment into the flask.

2. Inner Shell: The inner shell is the layer that holds the substance you want to keep hot or cold. It is typically made of glass or stainless steel. The material used for the inner shell is chosen for its ability to provide good insulation and prevent heat transfer.

3. Vacuum Insulation: Between the outer and inner shells, there is a vacuum insulation layer. This layer consists of an airtight space that contains no air or other gases. The vacuum acts as an excellent insulator because it reduces heat conduction and convection.

4. Stopper/Cap: The thermo flask has a stopper or cap that is tightly sealed to prevent heat transfer through conduction and convection. The stopper is typically made of plastic or silicone and helps maintain the temperature inside the flask by creating a seal and preventing air from entering or exiting.

5. Insulating Cork or Foam: Some thermo flasks also have an additional layer of insulation in the form of a cork or foam. This layer provides extra insulation and reduces heat transfer through conduction and convection.

Overall, the structure of a thermo flask, with its multiple layers and materials, works together to minimize heat losses. The outer shell, vacuum insulation, inner shell, stopper, and optional insulating layer all play a role in preserving the temperature of the substances inside by reducing heat transfer through conduction, convection, and radiation.