Question

human skin has a thickness of about 5×10⁻³ meter. a grain of sand has a thickness of about 1×10⁻³ meter. which is thicker, human skin or a grain of sand?

Explanation:

Step1: Compare the thickness values

We have human - skin thickness \(5\times10^{-3}\) m and sand - grain thickness \(1\times10^{-3}\) m.
Since \(5\times10^{-3}>1\times10^{-3}\) (when the exponents are the same, we compare the coefficients, and \(5 > 1\)).

Answer:

Human skin