Demonstrate collapse of a can by atmospheric pressure. The air is removed from a large coffee can by a vacuum pump, as seen in the photograph above. The can is then given a strong smack with a large hard rubber mallet, causing it to unseat from the vacuum seal and to collapse with a rather large bang. The resultant coffee can is shown in the photograph at the right. Very dramatic and noisy demonstration.
Large coffee can and mallet with vacuum pump assembly.
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