Question

A stone is dropped from a cliff into a lake 80 m deep another cliff 20 m away from the lake reflects the sound of the splash . what is the time difference between the two? take the speed of sound as 340 ms1 and g=10 ms 2

Answer 1

Answer:

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. At 20 °C, the speed of sound in air is about 343 metres per second, or a kilometre in 2.9 s or a mile in 4.7 s.