Maria and miquel were enjoying the fireworks when they got into a chemistry argument. maria insisted that the fireworks were the result of a chemical reaction. miguel disagreed. what would you tell them to solve this argument. a) it is a change of state, solid to gas, due to the addition of energy. b) it was a physical reaction since the fuse was lit and heat was produced. c) the color changes and the release of energy indicate a chemical reaction. d) it is an endothermic reaction because energy was added; therefore it is a chemical reaction,

C) The color changes and the release of energy indicate a chemical reaction.

Explanation:

The color changes in the fireworks when they start to burn is derived form the different compounds that are being burnt, for example strontium carbonate when is burnt it burns in a red color, barium chloride is colored green when is burnt but that is why it is a chemical reaction, because of the added energy and the color that it expells.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb