explain everything on Instagram: "A simple hand movement can significantly affect an airplane, particularly when hand-propping a small aircraft. Hand propping involves manually swinging the propeller to start the engine. To do this safely, one must grasp the propeller blade and pull it briskly downward while stepping away, keeping a safe distance from the propeller's path. A wrong move can lead to serious injury or death, as the propeller can chop up anything in its way¹. For instance, if the th

explain everything on Instagram: "Glass is typically an insulator, not a conductor, due to its atomic structure which inhibits the movement of electrons and restricts the flow of electric current. However, when heated to extremely high temperatures, around 1000 K, glass can become a conductor, allowing electricity to flow through it. This is because the heat energy frees up ions in the glass, enabling them to move and carry electrical charge ¹². For example, in a demonstration, a glass stem is h