*Wheels in his Relativistic Mass Accelerator Cannon*
Ok, give me a 6KG of Uranium-285, 30 Litres of liquid Helium and a KG slug of titanium, we'll get these bottles destroyed, and everything in a 5 mile radius.
So, does 1KG slug of titanium moving at 0.95c count?
And because I'm bored, this cannon will fire a projectile of an exit muzzle velocity of 0.95c, 1kg large, which would mean that the Kinetic energy of the slug, including relativistic mass effects, would be approximately 1.3x10^17J
Mass of object (m): 1 / √(1 - 0.95)^2 / 1^2)
Velocity of Object (v): 3x10^8 x 0.95
Kinetic Energy of object: (mv^2) / 2