Chapter 9.7, Problem 1E

To determine

To Find: the distance one can see if one stands on sand dune with eyes about $16\text{m}$ above sea level.

Answer to Problem 1E

  $10\text{ km}$

Explanation of Solution

Given:

Height above the surface of earth is $16\text{m}$ .

Calculation:

Using the formula.

  $\begin{array}{l}{\left(\text{Distance}\right)}^2=12,800,000\times \text{Height}\\ {\text{D}}^2=12,800,000\times \text{16}\\ \text{D=}\sqrt{12,800,000\times \text{16}}\\ D=14.3108\text{ km}\\ D=10\text{ km}\end{array}$

Therefore, the answer is $10\text{ km}$ .