Question

state whether true or false
1.Eardrum vibrates when sound waves enter the ear

2. the sharper the sound is, the smaller the frequency of a vibrating body

3. sound levels lower than eighty decibals is not harmful for ears

4.shortening the strings of guitar can lower it's pitch

​

Answer 1

Answer:

1. True

2. False

3. True

4. True

Answer 2

Answer:

1.true

2.true

3.false

4.true