1metre length is kept at​ 0 degree Celsius.why?

Answer 1

because if the temp goes up the bar will expand. A reference temperature must be chosen so that the length is standard. Zero is easy, water freezes there :)

Answer 2

Thank u

Answer 3

Not good

Answer 4

Great

Answer 5

that was helpful :)

Answer 6

Because it is it's initial point.

Answer 7

Not,above written is not good.
Answer is,
1m is kept at 0 degree C because when temperature increases length also increases