Question

write down the number of significant number in the following numbers
1) 0.003
2)0.1250g cm-²
3)6.4x10-⁶m
4)1.6x10-¹⁹c
5)9.1x10-³¹kg
​

Answer 1

Answer:

1)1

2)4

3)2

4)2

5)2

Explanation:

1)Those digits which are non-zero are significant.

For example, in 6575 cm there are four significant figures and in 0.543 there are three significant figures.

2)If any zero precedes the non-zero digit then it is not significant. The preceding zero indicates the location of the decimal point, in 0.005 there is only one and the number 0.00232 has 3 figures.

3)If there is a zero between two non-zero digits then it is also a significant figure.

For example; 4.5006 have five significant figures.

4)Zeroes at the end or on the right side of the number are also significant.

For example; 0.500 has three significant figures.

5)Counting the number of objects for example 5 bananas 10 oranges have infinite figures as these are inexact numbers.