Physics (AS & A Level) · May / June 2022 · Paper 12 · Question 6

The water surface in a deep well is 78.0 m below the top of the well. A person at the top of the well drops a heavy stone down the well. Air resistance is negligible. The speed of sound in the air is 330 m s–1. What is the time interval between the person dropping the stone and hearing it hitting the water?

1. A3.75 s
2. B3.99 s
3. C4.19 s
4. D4.22 s

As printed in the paper