Question

what is meant by significant figures state the rules for counting the number of significant figures in a measured quantity​

Answer 1

Answer:

Rules for Significant Figures :-

-> All non-zero digits are significant

-> Any zeros between two significant digits are significant

-> A zero, trailing a significant figure after decimal are significant

When reducing to a given number of signifcant figures, we round off as required.

For example

a) 0.954 [1 SF]

-> 1

b) 0.00973 [2 SF]

-> 0.0097

c) 2.5728 [3 SF]

-> 2.57

Answer 2

Significant figures :

In any measurement, the reliable digits plus the 1st uncertain digit are known as significant figures.