Electricity (the light bulb specifically). Artificial lighting extended the amount of time people spent outside socializing and instigated an expansion in the entertainment industry
Differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
Con eso, la red comercial del Océano Índico de dos mil años de antigüedad quedó paralizada, si no completamente destruida y afecto a africa asiático, India, Arabia
