TNT EQUIVALENT Given:
1 Kiloton of TNT releases 3 X 10$$¹² ft-lbs of energy.
Velocity = 20 K/sec = 65,616.7979 ft/sec. (typical meteoric velocity)
Mass of 20K Diameter Asteroid for type H chondrite material = 3.509187938 X 10$$¹⁷ lbs. (as calculated on page 11)
Mass of 2K Diameter Asteroid for type H chondrite material = 3.509186392 X 10$$¹³ lbs. (calculated by above method)
Calculate:
1 ton of TNT releases 3 X 10$$¹² ft-lbs / 1 X 10$$³ = 3 X 10$$⁹ ft-lbs of energy.
Explosive Force of 20 Km Asteroid of Type H Chondrite Material:
Force = 3.509187938 X 10$$¹⁷ lbs. * 65,616.7979 ft/sec / 3 X 10$$⁹ (ft-lbs/ton) = 7.675389191 X 10$$¹² tons of TNT
7.675389191 X 10$$¹² / 1 X 10$$⁶ = 7.675389191 X 10$$⁶ Megatons of TNT = 7.675 Million Megatons of TNT.

Explosive Force of 2 Km Asteroid of Type H Chondrite Material:
Force = 3.509186932 X 10$$¹³ lbs. * 65,616.7979 ft/sec / 3 X 10$$⁹ (ft-lbs/ton) = 767,538,699 tons of TNT
767,538,699 tons / 1 X 10$$⁶ = 767.5 Megatons of TNT.