Question

State the number of significant figures in 

(i) 0.007 m²

(ii) 2.64 × 10²⁴ kg 

(iii) 0.2370 g cm^-3

(iv) 0.2300m 

(v) 86400 

(vi) 86400 m

Answer 1

(i) 1, 

(ii) 3, 

(iii) 4, 

(iv) 4, 

(v) 3, 

(vi) 5 since it comes from a measurement the last two zeros become significant.