Question

An empty glass tumbler with a piece of cotton wool stuck into its bottom was lowered in an

upside down position into a tumbler of water. In the experiment, the cotton wool did not get

wet even when glass was fully submerged in water.

Read the given statements about the experiment.

(i) Air has mass. (ii) Air occupies space.

(iii) Air cannot be compressed. (iv) Air exerts pressure upside down.

(v) Air exerts pressure upwards. (vi) Air does not have any shape.

(vii) Air is invisible to us. (viii) Air and water are different substances.​

Answer 1

Answer:

Step 1 – Begin by filling the empty glass with water.

Helpful Tip: Ensure that the water is completely to the top of the glass. If there is any space between the water and the paper, the experiment won’t work.

Step 2 – Gently place the paper on the top of the glass.

Step 3 – Move the glass over the container or sink.

Step 4 – Gently place your hand on the paper, then flip the glass over.

Step 5 – Remove your hand from the bottom and watch in amazement as the paper stays covering the glass and the water doesn’t spill out.

hope it helps