Question

the thickness of a human hair is 0.0023 in. convert it to an si standard unit. write it in scientific notation. 180 × 10⁻³ m 1.5 × 10⁻⁶ cm 1.8 × 10⁻¹ cm 5.8 × 10⁻⁵ m

Explanation:

Step1: Recall conversion factor

1 inch = 0.0254 m

Step2: Convert 0.0023 in to m

$0.0023\times0.0254 = 5.842\times10^{-5}$ m $\approx5.8\times10^{-5}$ m

Answer:

$5.8\times10^{-5}$ m (corresponding to the last option)