Why did Iran shoot down the plane? Iran’s Revolutionary Guards shot down the Ukraine International Airlines flight on Jan. The Iranian report said: “The plane
Why does phenolphthalein turn pink in a base? Ionized molecules attract other molecules with the opposite charge and repel those with the same charge. Phenolphthalein
¿Cómo orientar un panel solar en Argentina? Configuración Sur Tradicionalmente, y dado que nuestro país se encuentra en el Hemisferio Norte del planeta, hay consenso