Question

describe an activity to show that air exerts pressure? in easy way​

Answer 1

Explanation:

Solution:

To show - Air exerts pressure

Procedure - Take a tin-can having an air tight cap (screw cap). Remove the cap and boil some water in it, so that steam comes out and in this way air from inside goes out. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating vacuum above them.

Observation - The can crumbles due to air pressure from outside. This proves that air exerts pressure

Answer 2

Answer:- Water glass trick

Explanation:- Fill a cup one-third with water. Cover the entire mouth with an index card. Holding the card in place, take the cup to the sink and turn it upside down. Remove your hand from underneath. Voilà! Because the water inside the cup is lighter than the air outside, the card is held in place by about 15 pounds of force from the air pushing up, while the force of the water pushing down is only about one pound of force.