Density - Shrink and Sink | ThinkTac | DIY Science
Channel: ThinkTac
Date: 2021-11-03

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. The density of an object is nothing but the ratio of its mass to its volume. In a fluid, objects that are less dense than the fluid will float, whereas those denser than the fluid will sink. In this TACtivity, a balloon is partially inflated and a nut is suspended from it with a thread such that the whole assembly floats in water. This is then inserted into a plastic bottle filled to the brim with water and closed tightly shut. When you squeeze the bottle, the balloon should start to sink! How and why?

To explore further and get your questions answered, visit the TACtivity homepage at - 
https://www.thinktac.com/tactivity/TCM06
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