Where does gold come from?

Gold is a rare metal, which is often challenging and dangerous to extract. But where does it come from?

Related extras

Diesel engine

The German engineer Rudolf Diesel patented the diesel engine in 1893.

Four-stroke Otto engine

This animation demonstrates the type of engine most commonly used in cars.

Wankel engine

A type of rotary engine of high efficiency

Archimedes’ principle with gases

Is there a difference between the weight of a plastic bottle filled with air and the weight of a...

Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines. Unlike internal...

The Bohr model

Among the most significant research carried out in the early 20th century focused on the...

Thermometers

There are various types of instruments used for measuring temperature.

An experiment with crushing results (observation)

How can a tin can be crushed without manual force? All you need is some water and heat.

Added to your cart.