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Ball with a ring is designed to demonstrate the expansion of a solid when heated. The kit should include a tripod, metal rings with a coupling and a ball with a chain. The top of the tripod rod should be curved and a chain with a ball should be attached to it. The ring coupling must fit onto the tripod rod and can be installed together with the ring at the required level. Above the ring on the tripod rod there should be a ball suspended on a chain. The dimensions of the ring and the ball must be selected so that when the ring moves up, the ball passes through it freely if their temperatures are equal. If the ball is heated to a temperature that is 80 °C higher than the temperature of the ring, then the ball should get stuck in the ring and stay on it until the temperature equalizes. To study the thermal expansion of bodies.
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