25 mm dia brass ball
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It consists of a 25 mm dia brass ball, secured to a brass ring by a chain, with wooden handle. Brass ball when cold will pass through the ring, but when heated, it will not. Thus this simple apparatus demonstrates effectively the thermal expansion. A. Ball Dia 25 mm B. Ball Dia 18 mm
Pendulum ball
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Parts Name: Pendulum Ball 1A Pendulum Ball 1B Ring & Ball 1C Ring & Ball With Handle 1D Ring & Ball With Handle
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