Application Of Conductors In Daily Life 3e3i5h

Application of conductors in daily life - Mercury is used in thermometers to absorb heat - aluminium is used for making frying pans to absorb heat quickly. - Motor vehicle engines are made of iron to conduct away heat - car radiators are made of iron to conduct away heat - refrigerators have copper pipes at the back for conducting away heat from coolant. - a wire gauze conducts heat quickly to the container placed on it for heating. - the iron plate of an electric iron is made of steel to absorb heat quickly - the head of a soldering iron is made of copper to be heated quickly. Application of insulators in daily life - the handle of a frying pan is made up of wood or plastic so that it is not hot - A styrofoam box is used for storing ice as or keeps away heat - sawdust is used for covering ice to prevent the ice from melting quickly - hot teapots are placed on mat to prevent damaging the table top - igloos are made of ice to retain heat in igloo. - A glass rod is used for stirring water - blankets are used for keeping our body warm - woolen clothes are worn in winter to keep the body warm Application of convection 1. A) during the day, the land becomes hotter than sea because the land is better conductor of heat than sea. B) the air above the land gets heated becomes less dense and rises. C) cooler air from the sea moves towards the land, causing a sea breeze. 2. A) at night the seas is warmer than the land because the land loses heat faster than the sea B) the air above the sea is less dense and rises. C) cooler air from the land moves towards the sea, causing a land breeze. 3)A) the ventilation in the house depends on convection B) cool fresh air enters the house through wiondows and doors C) warm, stale air which is less dense leaves the house through ventilators situated near the roof of house. Application of radiator 1. A) heat from the sun reaches the earth by the process of radiation. B) there is a vacuum between the sun and the earth. Heat can only be transferred through this vacuum by radiation. C) heat from the sun travels at the speed of light and takes only about 8.3 minutes to reach the earth. 2. A) an electric radiator uses the process of radiation to transfer heat to people sitting around it or warm the room. B) when the radiator os switched in, its heating element becomes red hot and radiates

heat. C) it is commonly used in temperate countries on winter.