PH-2245

Wave speed

Physics · Secondary 4 · Easy · Wave speed

1. 0.075 $\text{m s}^{-1}$
2. 4.3 $\text{m s}^{-1}$
3. 1.2 $\text{m s}^{-1}$
4. 13 $\text{m s}^{-1}$

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