What is the force between two balloons with a negative charge of 1.6 X 10^-10 C if the balloons are 5.0 cm apart?

Correct  Fc = 9.22 10⁻¹⁷ N

Explanation:

The formula for calculating the Coulomb force between two charged objects, in this case balloons is:

Fc = k · q₁ · q₂ / r² Coulomb force

where it was given:

k = 9 · 10⁹ N m²/C² dielectric constant,

q₁ = q₂ = q =  - 1.6 · 10⁻¹⁰ C

r = 5 cm = 5 · 10⁻² m   distance between charges

Since the given charges are both negative there is a repulsive force between them.

Fc = k · q² / r² = 9· 10⁹ ·  (1.6 · 10⁻¹⁰)² / (5 · 10⁻²)²

Fc = 9· 10⁹ ·  2.56 · 10⁻²⁰ / 25 · 10⁻⁴ = 0.922 10⁻¹⁶ = 9.22 10⁻¹⁷ N

Fc = 9.22 10⁻¹⁷ N

God is with you!!!

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles