Question

Which of the following measurements contains three significant digits?(a) 0.030 m(b) 0.300 m(c) 3.003 m(d) 300 m

Answer 1

0.030 contains only 2 significant digits, as the '0' after the decimal point is not significant.

0.300 contains 3 significant digits. All the digits after the decimal point are significant.

3.003 contains 4 significant digits, as all the digits in this number are significant.

300 contains only 1 significant digit.

Therefore the correct answer is option (b), 0.300