PH-2266

Wave speed

Physics · Secondary 4 · Easy · Wave speed

1. $4.0\,\text{m s}^{-1}$
2. $0.16\,\text{m s}^{-1}$
3. $5.8\,\text{m s}^{-1}$
4. $6.3\,\text{m s}^{-1}$

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