What is convection?And also give an example
What is convection?And also give an example
Convection is the transfer of heat by circulating it through air or liquids. Unlike conduction, in which there must be direct or indirect contact between the two objects for heat transfer to take place, convection relies on the circulating motion of the molecules in order to transfer heat. Also unlike conduction, which relies on microscopic movement of particles to transfer heat, convection is a bulk transfer of a lot of mass at the same time.
Like conduction, though, the heat transfer in convection moves from the hotter area to the colder one.
Example
Heating Water on the Stove
When a pot of water is placed on a stove and the stove is turned on, the pan itself becomes increasingly hotter due to conduction; that's where the metal of the pot is directly in contact with the heating element. But the water inside the pot is heated due to convection. As the water at the bottom of the pot (touching the increasingly hotter metal) rises, it transfers heat to the water above it. The cold water is pushed downward towards the hot bottom of the pot due to convection currents, and the process continues.
Convection is the transfer of heat by circulating it through air or liquids. Unlike conduction, in which there must be direct or indirect contact between the two objects for heat transfer to take place, convection relies on the circulating motion of the molecules in order to transfer heat. Also unlike conduction, which relies on microscopic movement of particles to transfer heat, convection is a bulk transfer of a lot of mass at the same time.
Like conduction, though, the heat transfer in convection moves from the hotter area to the colder one.
Example
Heating Water on the Stove
When a pot of water is placed on a stove and the stove is turned on, the pan itself becomes increasingly hotter due to conduction; that's where the metal of the pot is directly in contact with the heating element. But the water inside the pot is heated due to convection. As the water at the bottom of the pot (touching the increasingly hotter metal) rises, it transfers heat to the water above it. The cold water is pushed downward towards the hot bottom of the pot due to convection currents, and the process continues.
