Odpowiedź :
dane:
ρ = 2*10^17 kg/m³
m = 2m_s = 2* 1,9891*10^30 kg = 3,9782*10^30 kg
szukane:
2r = ?
ρ = m/V
m = ρ * V
V = 4/3 πr³
m = ρ * 4/3 πr³
r³ = 3m/4πρ
r³ = (3 * 3,9782*10^30 kg)/(12,56 * 2*10^17 kg/m³) = (3 * 3,9782*10^13 m³)/(12,56 * 2 ) = (11,9346*10^13 m³)/(12,56 * 2) = 0,4751 *10^13 m³ = 4,751 * 10^12 m³
r = ³√(4,751) * 10^4 m
2r = 2³√(4,751) * 10^4 m
ρ = 2*10^17 kg/m³
m = 2m_s = 2* 1,9891*10^30 kg = 3,9782*10^30 kg
szukane:
2r = ?
ρ = m/V
m = ρ * V
V = 4/3 πr³
m = ρ * 4/3 πr³
r³ = 3m/4πρ
r³ = (3 * 3,9782*10^30 kg)/(12,56 * 2*10^17 kg/m³) = (3 * 3,9782*10^13 m³)/(12,56 * 2 ) = (11,9346*10^13 m³)/(12,56 * 2) = 0,4751 *10^13 m³ = 4,751 * 10^12 m³
r = ³√(4,751) * 10^4 m
2r = 2³√(4,751) * 10^4 m