Physics
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
The ringing is not loud enough
The glass of the bell jar absorbs the sound waves
The bell jar is too small
There is no air or any other gas in the bell jar
There is no air or any other gas in the bell jar
The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because there is no air or any other gas in the bell jar.
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