Question

a) A tin half filled with water is heated to a boil. As the steam comes out it is immediately covered with its lid. It was taken out of the flame and cold water was poured on it. What would you observe?​

Answer 1

The pressure exerted by air on all bodies at all times in all directions is called air pressure. When air moves at high speeds, it creates a low pressure area. The air inside a balloon exerts pressure in all directions, and makes it blow up. Air opposes the motion of a moving object. This is called air resistance. That is why you have to exert yourself and pedal hard when you ride a bicycle.

Answer 2

1. Air moves from the region where the air pressure is high to the region where the pressure is low.

2.The cold water was poured in the tin but it was hot when we is poured cold water in the mouth of the can so, it was closed tightly.

3.Air exerts the pressure