Question

fill in the blanks
1. we hear sound only if its frequency is greater than the ____ and lowe than ____
2. A taut membrane produces sound of _____ frequency than a loose one.
3. sound travels _____ in steel than in air.
4.sound travels _____ in steel than in water.
5.sound is produced when objects_____
6. the number of oscillations per second is called _____
7. frequency is measured in______
8. sound cannot travel in ____​

Answer 1

Answer:

1. 20 hz and 20,000hz

2. high

3. Faster

4. Faster

5. vibrate

6. wavelength

7.hz

8. vaccum

Answer 2

Answer:

1. 20hrtz and 20000hrtz

2. Higher

3. with maximum speed

4. with maximum speed

5. Vibrate

6. Frequency

7. hertz (Hz)

8. Outer space

Explanation:

8.Sound Can not travel in outer space because it is a vaccum that contains nothing to carry sound.