12. a football match is being played at night in a stadium with flood lights on. you can see the shadow of a football kept at the ground but cannot see its shadow when it is kicked high in the air. explain.

100mg magnesium reacts with 20ml of 1.0m hcl

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol