ā© šµ šµ šµ āŖāā« Relativity Math ā āŖšæā« Physical Quantities ā Black Hole Angular Momentum (J) āā Gravitational Radius (RšØ) āā ISCO Radius (RšŖš“š¤š°) āā Lorentz Factor āā Schwarzschild Radius (Rš“) āā Spin (a) āā