Introduction to Heat and Temperarture

In the early morning of Sunday, Shreya was standing near a beach.

She was enjoying the Sun. It was very pleasant in the morning.

After some time, she called her friend Ryan and came to know that her friend is out of home.

Ryan was actually coming back home after playing a football match.

It was very hot afternoon. So, Ryan poured cold water on his head to get some relief from the hot sun-rays.

He asked with his friend when he should step out of home and how to know about Sunny days.

His friend told him that he must check the weather forecast and temperature conditions for the day and then he should make his schedule for the day.

He further told him that he is sweating because his body is releasing heat because it can not bear excess temperature. The concept of heat is actually explained by the temperature.

So, let's discuss heat.

Heat is a form of energy that can be transferred from one object to another object.

The SI unit of heat is 'Joule' which can be denoted by the symbol .

The other unit of heat is calorie which is denoted as . The relation between Joule and Calorie can be represented as,

Heat always flows from warmer object to cooler object.

It follows the path from the high-temperature region to the low-temperature region.

Now let's understand heat transfer with an example.

Suppose we have a glass of water at a temperature greater than the room temperature. We put our hand inside the water.

As we pull our hand out, we sense that the hand is a little heated. This happens because the heat is being transferred from the water to our hand.

In contrast to this, when we put our hand inside a bowl filled with ice cubes then we feel a little cold.

In this case, heat is transferred from our body to ice cubes, so our body feels a little cold.

Now let's discuss temperature.

Temperature is the measure of the hotness and coldness of the body.

It is generally measured in C in India. Fahrenheit is the oldest unit of temperature and is still practised by doctors.

In unit, the temperature is measured in .

So temperature defines the extent of hotness and coldness by providing an accurate value in a standard of measurement as .

Revision

Heat is a form of energy that can be transferred from one object to another object. The SI unit of heat is 'Joule' that can be denoted by the symbol .

Heat always flows from warmer object to cooler object.

Temperature is the measure of the hotness and coldness of the body.

It is generally measured in C in India. Doctors generally prefer Fahrenheit unit. In unit, the temperature is measured in .

The End