As air is pumped from the vacuum jar the sound level of the ringing bell will decrease until it can no longer be heard . this happens because air must be present in the jar in order for a) sound to be transferred b) electricity to flow through the wires c) the rubber to seal the jar d) the bell clanger to vibrate
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As air is pumped from the vacuum jar the sound level of the ringing bell will decrease until it can...
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