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A campfire uses all three heat transfer methods conduction, convection, and radiation.
Convection
A cup of boiling water since it has higher temperature. Note that heat transfer depends more on the temperature.
The heat transfer is by conduction.
To keep hot liquids hot and cold liquids cold by minimizing heat transfer between the inside of the thermos with the outside.
This type of heat transfer is called conduction. The transfer is from the warm hand to cool water.
Insulation
conduction and convection
When you dip your hand in cold water you feel it cold. Can you name the mode of heat transfer and its direction?
convection
A method of heat transfer in which heat is transmitted through the circulation of air or water.
Insulation is not a method of heat transfer.
Think of a pot of boiling water. The burner makes the heat, the heat rises, and the cold water replaces it, then the cold water gets hotter and rises. It's a cycle
Think of a pot of boiling water. The burner makes the heat, the heat rises, and the cold water replaces it, then the cold water gets hotter and rises. It's a cycle
Think of a pot of boiling water. The burner makes the heat, the heat rises, and the cold water replaces it, then the cold water gets hotter and rises. It's a cycle
convection
Assuming that 'cold' means normal room temperature, then heat would flow from your finger to the water.