sound and its properties

Question 1

Speed of sound in Fresh water

Answer 1

1500 m/s

Question 2

Speed of sound at 20 degrees celcius

Answer 2

343 m/s

Question 3

Speed of sound at STP

Answer 3

343 m/s

Question 4

Speed of an object travelling slower than the speed of sound

Answer 4

Sub-sonic/Infrasonic

Question 5

Speed of an object travelling faster than sound but less than light

Answer 5

Supersonic speed

Question 6

Unit used to measure the loudness of sound

Answer 6

Decibel

Question 7

Frequencies above the 20,000 hertz thresold of the human ear

Answer 7

Ultrasonic

Question 8

Frequencies below 20,000 hertz

Answer 8

Infrasonic