1)
E=k*q/R^2
q=E*R^2/k = 1,18*10^7*(0,0030)^2/(8,988*10^9) Кл ~
1,182E-08
Кл ~ 11,8 нКл
2)
ma=mg-q*E=0
E=m*g/q = σ/ε0
σ=ε*m*g/q =8,85*10^(-12)*10^(-15)*9,81/(4,8*10^(-19)) Кл/м^2 = 1,809E-07 Кл/м^2
3)
mv^2/2=q*E*x
x=mv^2/(2*q*E) =(5*10^6)^2/(2*1,7588*10^11*150) м =
0,4738079
м ~
0,47
м
4)
Q=C1*φ1 => C1=Q/φ1
Q=C2*φ2 => C2=Q/φ2
2*Q=C*φ
C=C1+C2=Q/φ1+Q/φ2
φ=2*Q/C=2*Q/(Q/φ1+Q/φ2) =2/(1/φ1+1/φ2) = 2/(1/60+1/40) B = 48 B