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Frey Scientific Buzzer in a Vacuum - 8 x 9.5 inches

Item #: 570533
$69.09 $51.82
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Frey Scientific Buzzer in a Vacuum is a updated version of the bell in a jar unit and helps in demonstrating that sound waves do not propagate in a vacuum. It requires 0.25 in tubing. 9.5 in Unit with 8 in dia has buzzer leads that are connected to a dry cell and the air nipple to any laboratory vacuum pump. Since air is evacuated from the jar, the sound of the steady buzzer diminishes in intensity.