Resposta :
Temos que:
F = k * |Q²| / d²
9*10^-1 = 9*10^9 * Q² / (10^-2)²
10^8 = Q² / (10^-4)
Q² = 10^8 * 10^-4
Q² = 10^4
Q = [tex] \sqrt{ 10^{4} } [/tex]
Q = 10^2
Q = 100 Couloumbs
Q = 100 * 10^-3 mC
***************
Q = 0,1mC
***************
F = k * |Q²| / d²
9*10^-1 = 9*10^9 * Q² / (10^-2)²
10^8 = Q² / (10^-4)
Q² = 10^8 * 10^-4
Q² = 10^4
Q = [tex] \sqrt{ 10^{4} } [/tex]
Q = 10^2
Q = 100 Couloumbs
Q = 100 * 10^-3 mC
***************
Q = 0,1mC
***************