Heat Transfer by Convection This mode of heat transfer is seen in liquids and gases in which the molecules are less densely packed and are free to move. Thus, convection is the primary mode of heat transfer in fluids.Let us see the following example and learn how heat is transferred by convection. The bottom of a vessel containing water is heated. After sometime, the … [Read more...] about Heat Transfer by Convection
Chemistry
How Silk is Manufactured
Sericulture: The Process of Silk Production Rearing of silkworms for silk production is called sericulture.It is a very complex and lengthy process. The healthiest moths are chosen for breeding and laying the eggs. The first step involves washing the silkworm eggs that had been stored; the eggs hatch only once a year in spring.After the eggs hatch, the larvae are spread … [Read more...] about How Silk is Manufactured
Which Animals Does Wool Come From
Which Animals Does Wool Come From WOOL Wool is an animal fibre. It is present as a thick coat of hair on the body of certain animals and keeps them warm. Air gets trapped in the spaces between the hair and does not allow the body heat to escape. That is why we wear woollen clothes in winter.Wool from Sheep A sheep’s hairy coat has two types of fibres: (i) the … [Read more...] about Which Animals Does Wool Come From
Heat Transfer by Conduction
Heat Transfer by Conduction We have seen in earlier examples that metal objects heat up when they come in contact with hot solids or liquids. For example, a stainless steel spoon becomes hot when left in a hot liquid. How do you think this happens? The heat from the hot liquid moves to the container and from there to the stainless steel spoon.How Does Conduction … [Read more...] about Heat Transfer by Conduction
What factors affect the rate of a reaction?
What factors affect the rate of a reaction? Factors Affecting the Rate of Reaction:The rate of a chemical reaction can be altered by changing the reacting conditions. There are five factors that affect the rate of a reaction:Total surface area of a solid reactant or particle size of a solid reactant Concentration of a reactant in solution Temperature … [Read more...] about What factors affect the rate of a reaction?