A bell, ringing in a bell jar, ceases to be heard as the bell jar is evacuated.
Harvard Natural Sciences Lecture Demonstrations
1 Oxford St Cambridge MA 02138 Science Center B-08A (617) 495-5824
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Size: from small [S] (benchtop) to extra large [XL] (most of the hall)
Setup Time: <10 min [t], 10-15 min [t+], >15 min [t++] /span>
Rating: from good [★] to wow! [★★★★] or not rated [—]
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