PLEASE HELP How are the different colors and designs generated in a firework? I really need help

Explanation:

By using different chemcial reactions

Color combinations are produced in the sky when various metal elements are heated, exciting electrons and releasing  excess energy in the form of light. The color you see is determined by the chemicals that burn at different wavelengths  of light in the spectrum. Higher energy compounds (e.g. copper chloride) emit colors like violet and blue and lower  energy compounds (e.g. strontium chloride) emit colors like orange and red.

Explanation:

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a galvanic cell( aka voltaic cell) and electrolytic cell

explanation:

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8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.