Sound

Question 0

Speed of sound in air

Answer 0

The speed of the sound in air Is 340m/s
Light is 3x10’8m/s
This is why we see lightning before it happens even though it happens at the same time.( Light is faster )

Question 1

Sound

Answer 1

Is a form of energy
It’s produce by vibrations
Sound can travel through a solid,liquid or gas
Cannot travel through a vacuum

Question 2

Echo

Answer 2

Reflecting of sound

Question 3

Ultra sound

Answer 3

above our level of hearing

Question 4

Ear protections

Answer 4

If people are working were sound is above 70db they have to wear ear protection (busy street protection)

Question 5

Permanent ear damage

Answer 5

Sound above 115db

Question 6

How can we hear miss Sheehan?

Answer 6

Energy covertion in hearing ,the movement energy is converter into electrical energy and goes into the brain to be processed

Question 7

Loud sounds

Answer 7

The loudness of a sound is called the sound intensity level
Sound intensity is measured in decibels
A sound level meter is used to measure the loudness of a sound in decibels