Question

The SI und of speed is confs.​

Answer 1

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metre per second

The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour.

Answer 2

Answer: Quick Reference. Symbol c orcs. The speed at which sound waves are propagated through a material medium. In air at 20°C sound travels at 344 m s−1, in the water at 20°C it travels at 1461 m s−1, and in steel at 20°C at 5000 m s−1.