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Ke 270 kg - PowerPoint PPT Presentation

Warm up

Warm up. If you shout, your voice travels at the speed of sound (340m/s) to a surface and back , and you hear an echo. If you hear an echo 5.2s after you shout, how far away is the surface from which the sound bounces? . Energy. Chapter 4. Energy. What is energy?

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Ke 270 kg - PowerPoint PPT Presentation

Warm up