Question

how many significant figures are there in 0.0200kg​

Answer 1

Answer: There are 2 significant figures

Explanation: These are the 0 and 2 after the decimal point

Answer 2

Answer:

Rules for determining significant figures :

1. All non zero digits are significant.
2. Zeros appearing between two non zeros digits, are significant.
3. Trailing zeros after the decimal point are significant.
4. The powers of ten are not significant. Like : 1.4×10^{-2}. Here, we have only 2 significant figures that is 1 and 4.
5. The zeros occuring to the left of the last non zero digit in a number less than 1, is not significant.
6. Change in units doesn't change the number of significant figures.
7. The trailing zeros in a non decimal number are not significant.

Using these rules, we can say that the measurement 0.0200 kg has 3 significant figures.