Question

Which is the more reasonable measurement of the distance between the tracks on a railroad: 1.435 ⋅ 10^−3 mm or 1.435 ⋅ 10^3 mm? Justify your answer

Answer 1

1.435 ⋅ 10^3 = 1.435 mm
1.435 ⋅ 10^-3 = 0.001435 mm

1.435 ⋅ 10^-3 = 0.001435 mm is very small and can't use to measure the distance between tracks on railroad.

So answer is 1.435 ⋅ 10^3 mm is the more reasonable