Question

(d) Standing at a distance, how is it possible to detect the filling of a bucket under a

water tap by hearing the sound.

(e) In the ball and ring experiment, if the ball after heating is left to cool on the ring

for some time, the ball again passes through the ring. Explain the reason.

(f) Give reason for increase in rate of evaporation of a liquid when air is blown above

it

(g) Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in

pillar?

(h) How are the electrical appliances connected in a house circuit? Series or in

parallel? Give reason.

(i) An iron washer is heated. State the effect on its (i) mass (ii) internal diameter (iii)

external diameter (iv) density

(j) Why is cooling produced when a liquid evaporates? fast anwer . in short sentence​

Answer 1

Answer:

On heating, the solid ball expands and increases in size and cannot pass through the ring. The ball after heating is left to cool on the ring for sometime, the ball again passes through the ring, because it contracts in size and passes through the ring.

Step-by-step explanation:

Hope this help you.