Question -
Answer -
(a) Answer: 1
The given quantity is 0.007 m2.
If the number is less than one, then all zeros on the right of thedecimal point (but left to the first non-zero) are insignificant. This meansthat here, two zeros after the decimal are not significant. Hence, only 7 is asignificant figure in this quantity.
The given quantity is 2.64 × 1024 kg.
Here, the power of 10 is irrelevant for the determination ofsignificant figures. Hence, all digits i.e., 2, 6 and 4 are significantfigures.
(c) Answer: 4
The given quantity is 0.2370 g cm–3.
For a number with decimals, the trailing zeroes are significant.Hence, besides digits 2, 3 and 7, 0 that appears after the decimal point isalso a significant figure.
(d) Answer: 4
The given quantity is 6.320 J.
For a number with decimals, the trailing zeroes are significant.Hence, all four digits appearing in the given quantity are significant figures.
(e) Answer: 4
The given quantity is 6.032 Nm–2.
All zeroes between two non-zero digits are always significant.
(f) Answer: 4
The given quantity is 0.0006032 m2.
If the number is less than one, then the zeroes on the right ofthe decimal point (but left to the first non-zero) are insignificant. Hence,all three zeroes appearing before 6 are not significant figures. All zerosbetween two non-zero digits are always significant. Hence, the remaining fourdigits are significant figures.