# What is the force, in terms of Coulomb's constant, between two electrical charges of -7 C and -3 C that are 6 m  apart?

May 28, 2016

$F = 5.25 \cdot {10}^{9} N$

#### Explanation:

${Q}_{1} = - 7 C$
${Q}_{2} = - 3 C$

$r = 6 \text{ } m$

$F = 9 \cdot {10}^{9} \frac{\left(- 7\right) \cdot \left(- 3\right)}{6} ^ 2$

$F = \frac{21 \cdot 9 \cdot {10}^{9}}{36}$

$F = \frac{21}{4} \cdot {10}^{9}$

$F = 5.25 \cdot {10}^{9} N$