Question

$\huge{\underline{\overline{\red{\boxed{\blue{Question-}}}}}}$ 

Write the rules for Writing significant figures. [ Explain with examples ] 

$\bold{\boxed{\huge{\boxed{\orange{\small{\boxed{\huge{\red{\bold{\huge\bold{\red{\ddot{\smile}}}}}}}}}}}}}$​

Answer 1

AnswEr:

Rules for writing significant figures :

★ Non zero digits are significant figures.

$\bold{\sf{\red{Example-}}}$ 121314 m

Here, Significant figures are 6.

★ Zero to the left of non zero digit is not significant figure.

$\bold{\sf{\red{Example-}}}$ 0.0001375 m

Here, significant figures are 4.

★ Zero between two non zero is a significant figure.

$\bold{\sf{\red{Example-}}}$ 1.0013 m

Here, significant figures are 5.

★ Zero after non zero digit having decimal is a significant figure.

$\bold{\sf{\red{Example-}}}$ 1.00 m

Here Significant figures are 3.

$\rule{200}2$

Significant figures of π are infinite.

Answer 2

Answer:

The rules for writing significant figures are as follows:-

• All the non zero digit are known to be significant.

Like - 259.2

Here, we have all the digits as non zero, hence all of them are significant. So, we have four significant figures here.

• All the zeros between two non zero digits are significant, no matter if the decimal point is present or not.

Like - 204.03

Here, we have two zeros between non zero digits. Hence, both the zeros are significant. So, here we have 5 significant figures.

• If a number is less than one, the zeros to the left and the right of the decimal point, is not significant.

Like - 0.0005

Here, the number given is less than 1 and we have the presence of zeros to the left in the right of the decimal point. Hence, according to the rule the zeros here are not significant. So, we have only one significant figure here.

• If there is not presence of decimal point, the trailing zeros are not significant.

Like - 152000

Here, the trailing zeros, according to the rule are not significant because there is not a process of decimal point. Hence, we have only three significant figures here.

• If there is a presence of a decimal point, the trailing zeros are significant.

Like - 2.600

Here, there is a presence of a decimal point in the number. Hence, according to the rule the trailing zeros are significant. So, we have four significant figures here.

• Fixed constants like pi, speed of light, etc. have infinite significant figures.