Here are the answers to your questions:
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Waves carry:
- Energy
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What type of wave requires a medium in which to travel?
- Mechanical
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The height of the wave is called:
- Amplitude
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Sound waves:
- All of the above (sound waves are longitudinal, mechanical, and require a medium)
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Sound waves travel fastest through:
- Steel (solid materials generally allow sound waves to travel faster compared to liquids and gases)
For labeling the waves, without images I can’t provide exact labels for points A, B, C, D. However, here’s what they commonly correspond to in wave diagrams:
For the first wave (assuming it's a transverse wave):
- A: Crest
- B: Trough
- C: Wavelength (distance from crest to crest, or trough to trough)
- D: Amplitude (height from the rest position to the crest or trough)
For the second wave (assuming it's a longitudinal wave):
- A: Compression (the area of the wave where particles are closer together)
- B: Rarefaction (the area of the wave where particles are spread apart)
- C: Wavelength (the distance between two consecutive compressions or rarefactions)
If you have specific labels you can give me, I could provide a more tailored answer!