[Red Badger]

Well they said 10 to 30 meters, so it could be 100 to 900 cubic meters....................

[Cvengr]

off by at least an order of magnitude
X cubed, not x squared.

10m-30m in length = 1000 cubicmeters
to
27000 cu meters

Now multiply by the density, say iron that won’t burn up before it hits.

Now multiply by the Velocity for momentum and if hitting in opposing directions, and assuming the Earth absorbs the impact, then it’s gonna be a bang.