The water department

This experiment shows a risk that is associated with reality – on a wet road.

We are part of the Earth’s closed system just as the microbes are part of the closed system in the glass container. They break down leaves to produce the building blocks for new plants. The plants produce oxygen, while the bacteria produce carbon dioxide.

What if everything we see follows a mathematical equation? The cochlea is just such a shape. We have built a sound-insulated room in the form of a cochlea containing several experiments.

When the pressure from the colliding water jets is equal, the water creates a bell. Adjust the preassure to change the size of the bell.

Slowly spin the fountain and look at the trajectories of the water jets. The water in the pipes rotate around the centre. The further from the centre the water gets, the faster it rotates. The water coming out of the inward-facing pipes has a greater rotation speed than the water coming out of the shorter pipes. This means that the water jet going inwards will go with the direction of rotation. This is known as the Coriolis effect.

The same thing happens in a 400-metre dash. When the runners are next to each other in the curve, and the runner on the outside track manages to keep up with the one on the inside track, maintain their speed and then switch to the inside track, they will be able to outrun the others in the race.

The French scientist Coriolis studied this phenomenon in the 1800s, when he noticed that air currents heading northwards always turn off to the east in the rotational direction of Earth.

To learn more, you can check out the experiment The Earth in a Bottle in the Water department.

Have you heard that you can float in the Dead Sea? This is a lake with a very high salt content. The salt content of the bottles differ: can you say which one has the highest level?

The density of a liquid varies with the temperature. When the temperature of a liquid increases, its density decreases. The buoyancy of the liquid then increases. 

Imagine that you want to wash your face, but are not allowed to put your hands into the water. Is it possible?

When the pipe is turned, the water wants to run out and the air makes its way up as small whirls are created at the sides of the ball. As the ball obstructs the pipe, only a small amount of water and air can pass each other at once. This is why the ball moves irregularly in the pipe.

Heron’s fountain is a water transportation system that is used as a fountain. Heron’s fountain was developed by the Greek engineer Heron, approximately 2,000 years ago.

The Hydraulic ram was known as early as the 18th century and uses only the energy of the falling water as its energy source. This means that its location is extremely important.

The long ball track illustrates several principles of physics such as acceleration, friction and energy conversion. And it might just get you sweating!

When the container rotates the water is pushed out towards the sides and it builds a parabola or curve.

The top of the pipe spreads water in all directions by using a narrow opening. The water’s surface tension makes the water stay together in the form of a thin film that creates a dome.

Tip the container backwards and forwards – what happens? You are experimenting with the surface tension of the water, one of several properties that make water a really cool liquid.

Just give us a minute, or two, to finish this page please!

Water is able to support a person and even a large ship. The strength, or ability of water to support weight, can be reduced by gas. For example, it’s more difficult to float in a whirlpool bathtub.

We often dive into things because we are curious. In order to dive into the sea, you must be able to control the gas inside the body and breathe under water.

Do you want to see how air streams and areas of low and high pressure move around the Earth? Spin the glass ball, which acts as a model for our planet.

The bottle is a water barometer that predicts the weather by measuring the pressure of the atmosphere. High pressure often means nice weather, while low pressure means poorer weather.

An impeller shaft contains paddles or blades. In this example, the water’s force helps create a vertical power to rotate the wheel.

Siphons can be used to move water with help from differences in levels, water pressure and the earth’s pull. 

The Wave Wall is a model of the water's wave motions. Put it in motion and study how the water moves. Is it lateral, vertical or a circular motion?

One bottle is filled with water. If you turn over the filled bottle at the top, there is a poor flow of water to the bottle below, or no flow at all. Why is that?

Let a ball follow the flow of water in the channel, which has been built on different levels and flows into the large barrel.

Did you know that there are staircases for water? This simple design does many good things for water, just as we become healthier by running up and down stairs.