What would the explosive yield of a 100kg, 1 meter long, solid core titanium rod falling to the earth from high-orbit be?
And if I were to use Newton's law of gravitation what would my answer be? I'd do it myself but I really don't know how. I know next to nothing about physics. Thus I came here to ask this question! :tongue:Assuming the bar's kinetic energy was converted entirely into an explosion, Earth's mass ME=6 x 1027 gm and radius RE=6 x 108 cm, and that the bar b was released from infinity, use Newton's law of gravitation:
Mainly it is just laziness. But the question was born from a competition between a friend and I. We are both trying to think of weapon systems that would be cheap to manufacture and would also be incredibly powerful. My idea was to fire a solid-core 100kg titanium rod from a satellite in high orbit.Using the above values, it comes to around 6.7*10^9 Joules. Hopefully, I haven't made any mistakes.
And Athyn, why would you want to know the answer to a scientific question if you can't plug in four values? No offence intended.
I don't believe that it would penetrate the ground too much. The force of the impact when it hits the ground would probably obliterate it. And even if it did penetrate the ground, the kinetic force of it slamming into the ground would be immense.It would mostly just penetrate the gound. Bunker busters were made from the large heavy cannons of battleships, and would simply pentrate many feet of concrete before their fuses would time out and set off the actual explosion.
Modern bunker busters wiegh more than 2000 kg and are dropped from heights of more than 10 km, if not more. They penetrate into reinforced concrete more than 20 ft, after which the explosives inside blow up and collapse the bunker. So, it may not be obliterated after all.I don't believe that it would penetrate the ground too much. The force of the impact when it hits the ground would probably obliterate it. And even if it did penetrate the ground, the kinetic force of it slamming into the ground would be immense.