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## Why does the dropper rise when you release the sides of the bottle?

Now, water is much denser than air. So when you push more water inside the dropper, **you increase its overall density**. … Release the pressure on the bottle’s sides and you stop forcing water inside the eye- dropper. The air inside it will now push out the extra water again, and the eye-dropper will rise.

## What causes a Cartesian diver to sink in a column of water when the air at the top is compressed?

When the higher pressure compresses the air in the packet, the packet displaces less water, thus **decreasing its buoyancy** and causing it to sink. When you release the sides of the bottle, the pressure decreases and the air inside the packet expands once again. The packet’s buoyancy increases and the diver rises.

## Why does an empty bottle float?

An empty plastic bottle has air inside it which means that **it reduces its density due to which it is able to float over water**. … In other words, its density is less than the density of water due to which reason it floats.

## When you squeeze the bottle on your Cartesian diver which direction will the diver go?

When you gently squeeze the sides of the bottle, diver #**1 should sink first** because it is the least buoyant. Squeeze harder and #2 will fall, and so on.

## What is the point of a Cartesian diver?

A Cartesian diver or Cartesian devil is a classic science experiment which demonstrates **the principle of buoyancy** (Archimedes’ principle) and the ideal gas law.

## How the Boyle’s law can be applied in Cartesian diver?

Boyle’s Law describes the relationship between pressure and volume. Increasing pressure on a gas will decrease its volume. When the sides of the diver are pressed, **the water is forced into the dropper, decreasing the volume of air in the dropper**. This makes it more massive and dense, causing it to sink.

## What does the Cartesian Diver demonstrate about Pascal’s principle?

The Cartesian diver is a classic demonstration which effectively demonstrates Pascal’s Principle, which **states that Pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid.**

## How did Cartesian Diver get its name?

Due to the increase in the relative density of the Cartesian diver, the diver sinks to the bottom of the bottle. Why is this diver called “Cartesian”? “Cartesian” **comes from the name of the French mathematician and philosopher Rene Descartes**, who lived from 1596 until 1650.

## What means Cartesian?

/ kɑrˈti ʒən / PHONETIC RESPELLING. **adjective**. **of or relating to Descartes**, his mathematical methods, or his philosophy, especially with regard to its emphasis on logical analysis and its mechanistic interpretation of physical nature. noun.