about black hole formula

[YueNoMoral]

1. Also to point out, any black hole within up to Low 4-C should be calculated with this formula: ((299792458^2/(2*6.674*10^-11))/(5.972*10^24))*(2.487*10^32) * radius in meters = energy in joules.

2. And anything above will use this formula: ((299792458^2/(2*6.674*10^-11))/(1.989*10^30))*(5.693*10^41) * radius in meters = energy in joules.

what does black hole within up to Low 4-C means? does it means that if the Black Hole mass is the same as Sun the formula used is number 2?

 

[YueNoMoral]

nevermind, i already know the meaning

 

[Kudekuba]

1. Also to point out, any black hole within up to Low 4-C should be calculated with this formula: ((299792458^2/(2*6.674*10^-11))/(5.972*10^24))*(2.487*10^32) * radius in meters = energy in joules.

2. And anything above will use this formula: ((299792458^2/(2*6.674*10^-11))/(1.989*10^30))*(5.693*10^41) * radius in meters = energy in joules.

what does black hole within up to Low 4-C means? does it means that if the Black Hole mass is the same as Sun the formula used is number 2?

I believe you can use this formula to get the minimum G.B.E in Joules for a Black Hole according to Newtons' Law:

G.B.E = ( M * c * c ) / 4

The sources:

Demostration of GBE of an spherical celestial Body

Approximation for the GBE of a Black Hole