plz answer my question
Attachments:
Answers
Answered by
3
Answer:
b) speed of sound falls
Explanation:
The experiment is done by placing an electrical bell in the bell jar. As the air is pumped out of the sealed bell jar, the sound from the bell jar fades. ... This demonstrates that the sound wave cannot travel through vacuum. That is, a sound wave needs a material medium for its propagation.
Similar questions