๐๐ซ๐๐ง๐ฌ๐๐๐ซ ๐จ๐ ๐๐๐๐ญ
๐๐จ๐ง๐๐ฎ๐๐ญ๐ข๐จ๐ง
Activity
Put candle above a iron rod and place 4 pieces of wax on the rod while leaving 2 cm space at max and place the rod between 2 bricks to prevent the rod from falling
Candle
Wax 1
Wax 2
Wax 3
Wax 4
Melted
Melted but not as much as Wax 1
Partially Melted
Not Melted
Brick
Definition
The process by which heat is transferred from hotter end to the colder end of an object is known as conduction.
๐๐จ๐ง๐ฏ๐๐๐ญ๐ข๐จ๐ง
Activity
Take a round bottom flask. Fill it two-thirds with water. Place it on a tripod, or make some arrangements to place the flask in such a way that you can heat it by placing a candle below it. Wait till the water in the flask is still. Place a crystal of potassium permanganate at the bottom of the flask gently using a straw. Now, heat water by placing the candle just below the crystal.
Table
Flask With water
Crystal of potassium permanganate
Candle
Definition
When water is heated, the water near the flame gets hot. Hot water rises up. The cold water from the sides moves down towards the source of heat. This water also gets hot and rises and water from the sides moves down. This process continues till the whole water gets heated. This mode of heat transfer is known as Convection
๐๐๐๐ข๐๐ญ๐ข๐จ๐ง
Definition
Example- Microwaves, Sun etc.
From the sun the heat comes to us by another process known as radiation.