Question

State the number of significant figures in the following (a)0.007 m^2 (b)2.64 xx 10^(24)kg (c) 0.2370 g//cm^-3

Answer 1

The number of significant figures are:

(a) 1

For numbers less than one, all zeros to the right of the decimal point are insignificant.

(b) 3

Significant figures doesn't depend on the power.

(c) 4

All trailing zeros are significant

Answer 2

The number of significant figures in th following numbers are:

(a) 0.007 m^2 = 1

Leading zeros are NOT significant. The numbers that are less than 1, all zeros to the right of the decimal point are insignificant.

(b) 2.64 xx 10^(24)kg=3

Significant figures independent of the power.

(c)0.2370 g//cm^-3= 4

Trailing zeros that are not needed to hold the decimal point are considered as significant figures. All trailing zeros are significant figures