Question

type the correct answer in the box. the pressure inside a tire is measured as 28.0 $\frac{pounds}{inch^{2}}$. what is its pressure in $\frac{newtons}{centimeter^{2}}$? 1 pound = 4.45 newtons 1 $inch^{2}$ = 6.45 $centimeters^{2}$ express the answer to the correct number of significant figures. the pressure is $square$ $\frac{newtons}{centimeter^{2}}$.

Explanation:

Step1: Convert pounds to newtons

$28.0\times4.45 = 124.6$ newtons

Step2: Convert square - inches to square - centimeters

Since the pressure is in $\frac{\text{pounds}}{\text{inch}^2}$, and we know $1\text{ inch}^2=6.45\text{ centimeters}^2$.

Step3: Calculate the pressure in $\frac{\text{newtons}}{\text{centimeter}^2}$

$\frac{124.6}{6.45}\approx19.3$ $\frac{\text{newtons}}{\text{centimeter}^2}$

Answer:

19.3