The law you need is :
lets call the constant c = 4pi*epsilon naught*r2.
where r is radius ( or seperation of the charges). epsilon naught is a constant of about 8.85*10^-12 or something like that. and 4 pi is just 4 times pi.
the actual equation is
FORCE= (q1*q2)/c
March has 31 days.
3 Marches have 93 days.
Each day has 86,400 seconds.
(93 days) x (86,400 sec/day) = 8,035,200 sec.
Answer:
a) - 7.40 * 10^6 Nm^2/C^2
b) More lines enter than leave the surface
Explanation:
a)
As per the Gauss Law
ε * Intg E.dS = q
E.dS = flux over the whole hull of the submarine
ε = permittivity of vacuum
flux = Σ (charges)/permittivity of vacuum = ( 6.95 + -9 + 27 + -90.5 )*10^-6/8.85 x 10^-12 =
= -0.00006555
/(8.85 x 10^-12)
= - 7.40 * 10^6 Nm^2/C^2
b)
The net electric flux is negative, more lines enter than leave the surface.