PH-2273

Wave speed

Physics · Secondary 4 · Medium · Wave speed

1. $8.0\times10^{-4}\,\text{m}$
2. $1.3\times10^{-3}\,\text{m}$
3. $3.1\times10^{-7}\,\text{m}$
4. $1.3\times10^{3}\,\text{m}$

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