Question

Explain with an activity flow of heat through a metal strip

Answer 1

activity...

take a metal srip and drop some wax on one end of it then press a nail to the wax now heat from other end when strip get hot the nail which is pressed in wax get removed from it due to melting of wax..

it's prove that heat can transfer in metal..

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Answer 2

Objective

This topic gives an overview of; 

Conduction

Insulators

Convection

Sea breeze

Land breeze

Radiation

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.



Activity 1

Take a rod or flat strip of a metal, say of aluminium or iron. Fix a few small wax pieces on the rod. These pieces should be at nearly equal distances. Clamp the rod to a stand. If you do not find a stand, you can put one end of the rod in between bricks. Now, heat the other end of the rod and observe.

The process by which heat is transferred from the hotter end to the colder end of an object is known as conduction. In solids, generally, the heat is transferred by the process of conduction.

Do all substances conduct heat easily? You must have observed that the metallic pan for cooking has a plastic or wooden handle. Can you lift a hot pan by holding i t from the handle without getting hurt?