Imnooriii

Convection: Did you ever notice when we leave a hot cup of tea for some time it did not remains hot as before? Why? It is due to heat being transferred from the cup to the surrounding. As we already know if the temperature difference between two bodies is present then heat transfers from the hot to the cold body. Heat can transfer by different modes. In the case of a hot cup, heat is transferred by convection. Due to the motion of air, warm air rises, and cold air replaced it that’s why after some time hot cup of tea becomes relatively cold. What is convection? Convection is a mode of heat transfer. In convection heat transfer between a solid surface and the adjacent liquid or gas that is in motion. Convection involves the combined effect of conduction and fluid motion. That’s why convection is also known as conduction with fluid flow. How convection happens? cooling of block by convection. Consider the cooling of a hot block by convection. As we know convection is the transfer o