Question

An alarm bell is kept inside a vessel as

shown in Figure. A person standing

close to it can distinctly hear the sound

of alarm. Now if the air inside the vessel

is removed completely how will the

loudness of alarm get affected for the

same person?​

Answer 1

Answer:

the person cannot hear the sound because sound cannot travel in vaccum,it needs air to travel

Answer 2

Answer:

The loudness of the sound will decrease as the air is removed slowly from the plastic bottle. If the air in the plastic bottle is removed completely, there is vacuum in the bottle. The sound cannot travel through vacuum and we cannot hear the sound of the alarm clock at all.Read more on Sarthaks.com - https://www.sarthaks.com/98242/alarm-bell-kept-inside-vessel-shown-person-standing-close-distinctly-hear-the-sound-alarm