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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While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank
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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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