Question

bell jar experiment observation and data. plzz friends give me the answer very important​

Answer 1

An example of a classroom science experiment involving a bell jar is to place a ringing alarm clock under the bell jar. As the air is pumped out of the sealed bell jar, the noise of the alarm clock fades, thus demonstrating that the propagation of sound is mediated by the air.

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Answer 2

Answer:

The bell jar is a representation of the respiratory system. There is a diaphragm which when pulled the balloons decrease in size while when it is released it increases in size.