Respuesta :
Explanation:
Convection is defined as the process in which fluids (liquids or gases) are mixed together and heated. Then more dense (cooler) material will sink at the bottom and less dense (hotter) material will rise at the top.
This intermixing of fluids will lead to the formation of convection currents.
This means that convection process arises only between liquids or gases and also, it can occur during the process of boiling.
Thus, we can conclude that the following statements are true.
- Convection always involves the circulation of a liquid or gas.
- Convection can only occur during the process of boiling.
Convection always involves the circulation of a liquid or gas is the statement that is true about convection.
In thermodynamics, convection is the form of heat propagation of liquids and gases, it is produced by a translation of the particles, inside the fluid, due to differences in density.
That is, it is a natural process in which heat is transferred between two liquid substances, between two gaseous substances or a gas and a liquid, as long as they are at different temperatures.
Heat transfer occurs when there is a difference in temperature between two bodies that are in direct contact; it is then when the heat flow from the body arises from the highest to the lowest temperature.
Therefore, we can conclude that convection always involves the circulation of a liquid or gas is the statement that is true about convection.
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