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the test tube is used to handle and cultivate molds
How about a penny
or heat small quantities of chemicals while performing experiments
Arrows and call outs help the student locate important features
Tuning Fork, Superior Musical "E", 329.23 Hz Magnet the test tube is usedOur machined aluminum tuning forks are calibrated and individually tested to ensure accuracy to + 1 Hz. Aluminum also is less sensitive to temperature and humidity variations that could affect the frequency.
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