Question

Which of the following has the highest number of signi cant gures?
a) 0.007 m²
b) 2.64x10²⁴ kg
c) 0.0006032 m²
d) 6.3200 J

Answer 1

Answer :- option (d)

Explanation :- let's check options
(a) 0.007 m² , it has only one significant figure. Because we know, Zeros to the left of the first non zero digit are not significant.

(b) 2.64 × 10²⁴ kg , it has three significant figure . Because we know, all the non-zero digits are significant figures.

(c) 0.0006032 m², it has four significant figure.
Here two rule applied to show significant figure.
rule 1 :-Zeros to the left of the first non zero digit are not significant.
rule 2 :- all the non-zero digits are significant figures.

(d) 6.3200 J , it has five significant figure.
because we know, For numbers with decimal points, zeros to the right of a non zero digit are significant.

Hence, option (d) is correct

Answer 2

Answer:here option (D) is correct one.

For more explanation

see the attachment

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