In essay on the transfer tp heat , kunal wrote that is a given situation ,heat is tranferred using olny a single mode at a same time. Is he right or worng ?(hint :How dows water in a shinny stainless steel pan without the lid get heated over a lit stove?)
Answers
Answer:
Explanation:
Transfer of Heat
You might have observed that a frying pan becomes hot when kept on a flame. It is because the heat passes from the flame to the utensil. When the pan is removed from the fire, it slowly cools down. Why does it cool down? The heat is transferred from the pan to the surroundings. So you can understand that in both cases, the heat flows from a hotter object to a colder object. In fact, in all cases heat flows from a hotter object to a colder object.
In solids, generally, the heat is transferred by conduction. In liquids and gases the heat is transferred by convection.
No medium is required for transfer of heat by radiation.
The materials which allow heat top as through them easily are conductors of heat.
The materials which do not allow heat to pass through them easily are called insulators.
Dark-coloured objects absorb radiation better than the light-coloured objects. That is the reason we feel more comfortable in light-coloured clothes in the summer.