Question

The sound of an explosion on the surface of a lake is heard by a diver 150m below and by a boat man 150m away the point of explosion​

Answer 1

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(i) The diver who is underwater will hear the sound first as compared to the person in boat .

(ii) This is so because , rarer the medium less is the speed of the sound and denser the medium more is the velocity of sound , since sound is a form of energy which causes a disturbance in its surrounding .

More to know:-

• Speed of sound in air is 340m/s .
• Sound is a longitudinal wave.
• Speed of sound is more in denser medium as compared to the rarer medium.
• The most loudest natural sound on Earth is caused by an erupting volcano.
• Flies are not able to hear any sounds at all.
• Sound is unable to travel via a vacuum because a vacuum is empty of matter.
• Most white cats that have blue eyes are often unable to hear sounds and are usually deaf.
• Rhinoceros can hear a sound of frequency less than 5 Hertz .
• Human have ha hearing range of 20 Hz to 20,000 Hz .