The video's creator attempts to debunk a fake video that supposedly shows a water railgun being made using two electromagnets on the side of a steel pipe. The creator explains that water is not magnetic, but it can be moved using magneto-hydrodynamics, a phenomenon that occurs when a conductive fluid is placed in a magnetic field. The creator then tries to create a water railgun using this principle, but it doesn't work as expected. They eventually succeed in creating a small flow of water, but it's not a practical or efficient way to move water. The video ends with a promotion for the creator's sponsor, Brilliant.org, which offers interactive lessons on electricity, magnetism, and other topics.
Here are the key facts from the text:
1. Water is not magnetic.
2. Ionized impurities in water make it more conductive.
3. Pure water is non-conductive.
4. Eddy currents are created by changing magnetic fields in conductive materials.
5. Aluminum and steel sheets can be moved by Eddy currents.
6. The resistance of salt water is not linear and varies with the amount of current passing through it.
7. The Magneto hydrodynamic effect can be used to move conductive liquids like salt water using magnets and electric current.
8. Salt water has a much higher resistance than copper, which limits its current and force.
9. Railguns work by using a voltage potential across two rails to create a current and magnetic field, which propels a conductive bridge forward.
10. Permanent magnets can lose their magnetism when heated.
11. A water railgun can be created using the Magneto hydrodynamic effect, but it is not efficient and can break down the water under electrolysis.
12. The water railgun experiment can create a small flow of water, but it is not visible to the naked eye.
13. The experiment can also create gases that may be poisonous.
14. The water railgun can be destroyed if it draws too much current.