/sci/ - Science & Math

In the interest of science...

Say we constructed in space a very large chamber made of the most heat resistant building materials that is surrounded by a very dense and thick metal, strong enough to resist the force of a 50MT nuclear weapon, IE.The Tsar Bomba.

Contruct a very long barrel attached to the chamber that seats a very hard, dense, and heat resistant projectile that is then shot out by the force of the nuke going off. Say like a gun except the powder charge is actually the nuke.

How fast would the projectile go? If it hit a target how much energy [provided it stayed solid and did not disintegrate] would it unleash on say, a planet? The projectile being the size of say, a 155mm standard howitzer shell.

Again, just something i'm curious about.