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10 results for “radius”

Formulae (10)

R = \frac{abc}{4K}

Radius of a triangle circumscribed circle.

r = \frac{K}{s}

Radius of a triangle inscribed circle.

s = r\theta

Arc length from radius and central angle in radians.

r_s = \frac{2GM}{c^2}

Event horizon radius of a black hole.

L = 4\pi R^2 \sigma T^4

Luminosity of a star from radius and temperature.

r_{ph} = \frac{3GM}{c^2}

Radius where gravity bends light into a circular orbit.

r_H \approx a\left(\frac{m}{3M}\right)^{1/3}

The zone where a body's gravity dominates over its host's.

R_h = \frac{A}{P}

Cross-sectional flow area divided by wetted perimeter.

r = \dfrac{v^2}{g\tan\phi}

Radius of a level coordinated turn from speed and bank angle.

r = \frac{v^2}{g\tan\phi}

Radius of a coordinated banked turn.