or log in
Direct action pumps and suction pumps are among the simplest water pumps.
A hot air balloon is a balloon aircraft which is lifted by hot air.
In this experiment we prove that it is possible to cut a bottle with just a string.
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
In certain cases, liquids do not mix together, and form layers instead. See what happens when we...
This animation introduces the studies of astronomers and physicists whose works...
A spectacular optical illusion using a chain of closed rings.
We can further develop the machine we presented in the previous video, so it can dispense...