Question

C2. Fill in the blanks.
1. The frequency of a sound determines its
2. Sound above 20000 Hz are called
(can/cannot) be heard.
3. All unpleasant and undesirable sounds are known as
They
Noise
5. The more is the frequency, shriller is the
6. Sound cannot travel through
4. The SI unit of frequency of sound is heety (Hz
seed​

Answer 1

Answer:

1. pitch
2. ultrasound
3. noise
4. hertz (Hz)
5. sound
6. a vacuum

Answer 2

Explanation:

i know this will help you