What types of energy are produced during firework displays?

Heat, Light and Sound.

Explanation:

There are 3 forms of energy generated by fireworks. They are:

Sound: Some fireworks produce a crackling sound while others creating an explosive sound.

Light: When fireworks explode, we see a bright light emitted from the explosion.

Heat: The explosive sound heard from fireworks are due to a quick release of energy at the surface of the fireworks.

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.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue