Physics on fingers

Interaction of indicator, magnesium oxide and sulfuric acid 😱

The process of removing snow from power lines by applying a series of controlled short circuits ⚡️🥶

An example showing how vibration acts on a nut and bolt To avoid unscrewing on structures under vibration a lock nut is used - this is a 2nd nut (more often a narrower nut).

Mexican fire opal 🔥 The rarest variety of the opal family. The mineral differs from its brethren by its incredible fiery color. It is due to its characteristic coloring that the gem is otherwise known as "fire opal". The bright orange color of precious cabochons is due to the presence of iron.

Augmented reality in a smartphone 😨