Question

Q. What is the S.I unit of length and what is their symbol?​

Answer 1

Answer:

The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-1, where the second is defined in terms of ΔνCs. The kilogram, symbol kg, is the SI unit of mass.

Explanation:

I hope it's helpful to you

Mark me brainlist

Answer 2

Answer:

The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when

expressed in the unit

$\bf \blue{m \: {s}^{ - 1} }$

where the second is defined in terms of ΔνCs. The kilogram, symbol kg, is the SI unit of mass.