The ceiling fan direction in winter should be rotating clockwise or reverse. Warm air rises and gets trapped near the ceiling so when the ceiling fan direction is in reverse mode it circulates the warm air from the ceiling to the floor helping take the chill out of the air.
A reactant is a substance that is being used up or consumed in a chemical reaction. It is needed in large amount as compaed to reagent. A reagent is something which is used to initiate a reaction and aids to carry out it and it is also consumed in a reaction, unlikely to catalysts which are not consumed in a reaction.
Surfactant Definition: Surfactant is the word that combines the terms surface active agent.Chemical species that acts as wetting agents to lower the surface tension of a liquid and allow for increased spreadability.This can be at a liquid-liquid interface or a liquid-gas interface. Also Known As: tenside. Examples: coating on the surface of the alveoli in the lungs.urfactant Definition: Surfactant is the word that combines the terms surface active agent.