Final answer:
The number of significant figures in each measurement provided ranges from 1 to 7, indicating the precision of each measurement. Leading zeros are not counted, while all other digits, including trailing zeros after a decimal point, are.
Step-by-step explanation:
The number of significant figures in a measurement reflects the precision of that measurement. Here's the number of significant figures for each given measurement:
- (a) 38.7 g - This measurement has 3 significant figures.
- (b) 2 x 10^18 m - This has 1 significant figure, as the coefficient '2' is the only significant figure here.
- (c) 3,486,002 kg - This has 7 significant figures; trailing zeros in a number that contains a decimal point are significant.
- (d) 9.74150 x 10^-4 J - This measurement has 6 significant figures.
- (e) 0.0613 cm^3 - This has 3 significant figures, zeroes before the '613' are not considered significant.
- (f) 17.0 kg - This measurement has 3 significant figures.
- (g) 0.01400 g/mL - This has 4 significant figures; the trailing zeros are significant because they are after the decimal point and after a nonzero digit.