A Cartesian Diver is a closed system used to demonstrate Archimedes’ Principle. … In a sealed bottle of water, the Cartesian diver will just float at the surface. When the bottle is squeezed the pressure inside goes up and the air bubble gets smaller.

## What does the Cartesian Diver teach about Archimedes Principle?

Archimedes’ principle applies because the Cartesian diver sinks when its density is increased. … As the volume of air decreases, water is taken up into the Cartesian diver which increases the density of the Cartesian diver so it sinks.

## What is the purpose of the Cartesian diver experiment?

Squeezing the bottle causes the diver (the eye dropper) to sink because the increased pressure forces water up into the diver, compressing the air at the top of the eye dropper. This increases the mass, and density, of the diver causing it to sink.

## What is the independent variable in the Cartesian diver experiment?

The independent variable in this lab is pressure ● The dependent variable is buoyancy of the cartesian diver.

## Who discovered the Cartesian Diver concept?

The Cartesian Diver, named for the scientist René Descartes who is said to have invented the toy, is an object that ordinarily floats but sinks when it is under pressure.

## Why is it called a Cartesian diver?

The Cartesian diver, named after French philosopher and scientist René Descartes, works because of several factors. When you squeeze the sides of the bottle, you are increasing the pressure on the liquid inside. That increase in pressure is transmitted to every part of the liquid.

## Why does the Cartesian diver float at first?

As the water level rises in the diver, it becomes less buoyant and the diver sinks. As you release the pressure on the bottle, the compressed air expands and forces the water back out. The diver floats to the top of the bottle because now it is more buoyant.

## Why do scuba tanks not float?

Steel scuba tanks do not float, they always are negatively buoyant. Aluminum scuba tanks sink when full but can float when empty due to losing the weight of the compressed air. When referring to how and why scuba tanks float, it all relates to buoyancy.

## What does Cartesian coordinates mean?

The Cartesian coordinates (also called rectangular coordinates) of a point are a pair of numbers (in two-dimensions) or a triplet of numbers (in three-dimensions) that specified signed distances from the coordinate axis.

## Does the shape of an object affect its ability to float?

The shape of an object does affect its ability to float.

Some, such as cargo boats, are made of steel. Clearly, steel is more dense than water, yet these boats still float.

## How do you make a Cartesian diver?

Make a Cartesian Diver

- Remove any labels from your bottle so that you can watch the action.
- Fill the bottle to the very top with water.
- Place a small pea-size piece of modeling clay at the end of the point on the pen cap. ( …
- Slowly place the pen cap into the bottle, modeling clay end first. …
- Now screw on the bottle cap nice and tight.

## Who is the word Cartesian named after?

The Cartesian plane is named after the French mathematician and philosopher René Descartes (1596–1650), who introduced the coordinate system to show how algebra could be used to solve geometric problems.

## How is buoyancy affected by density?

If an object is more compact, or denser, than water, it will sink in water. If the density of an object is less than the density of water, the object will float in water.

## How do you make a Cartesian diver with a straw?

Assembly

- Step 1: Fold straw or tubing in half and fasten. Straws: The straws are almost 6″ long. …
- Step 2: Add weight to the diver. Pull the outside end of a paper clip out a bit.
- Step 3: Fill the bottle with water and test the diver. …
- Step 4: Make a Hook Out of Straws, Paper Clips and Tape.