/sci/ - Science & Math

I was watching a TV show with friends (pic related) and in it someone wants to erase the contents of a hard drive with an EM field.
Now the computer is in an evidence vault described only as "two feet of concrete" in addition to that there is somewhere between 5 and 20 feet of space between the computer and the source of the EM field which is in a van.
In the show they didn't generate an EM pulse, just built a huge electromagnet run by 24, 12 volt car batteries.
When they turned it on all the metal objects inside the evidence room moved toward the wall the van was behind and after a few seconds the van tipped over toward the wall.
Now, my guess is that they may have had enough juice to erase or at least corrupt a hard drive but not enought to make small objects fly toward the magnet much less pull a small truck onto it's side.
Also, if there had been a layer of steel inside the wall they would have been fucked too.

Am I correct in any or all of that?

>>5944956
Quit screwing around on 4chan Jesse, we have to cook