Henri draws a wave that has a 4 cm distance between the midpoint and the trough. Geri draws a wave that has an 8 cm vertical distance from the trough to the crest.Which statement best describes the energy in Henri and Geri’s waves?

Amplitude is the distance from the midpoint to a crest or trough. Henri’s amplitude is 4 cm; Geri’s trough-to-crest distance is 8 cm, so her amplitude is half of that, also 4 cm. Waves with the same amplitude have the same energy, so Henri’s and Geri’s waves have the same amplitude and energy.

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