Waves transfer energy without transferring matter.

Choose your topic:

• Waves [FREE] - Longitudinal and transverse waves explained

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• Wave Speed [FREE] - How to measure how fast these waves are travelling

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• Reflection, Transmission and Absorption [FREE] - Bouncing waves

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•  Sound [FREE]  - Particle vibrations between 20 and 20,000 Hz, and how our ears pick these up 

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•  Ultrasound [FREE]  - With a frequency higher than 20,000 Hz these have many uses​

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