I think the EMP destruction of a single weapon (assuming it's from a nuclear weapon) would be closer to taking out a city, not the entire USA.
Only the pre-cold-war Soviet Union and the USA have, AFAIK, enough resources to create enough weapons to wipe our entire naton.
Of course, if you launch that many nukes, the EMP bursts are gonna be the least of your worries.
Farm equipment is unlikely to go dead. The metal in a tractor is likely to act as a Faraday cage, the metal of the engine is likely to absorb a lot of the electrical charge, and spark/glow plug wires are designed to handle large voltages. In addition, I don't see targeting farmland as being effective, as it tends to be sparse and have relatively little population.
A diesel engine that is already running would continue to run, FYI: Glow plugs don't depend on electrical current to funciton, they rely on heat being generated in the engine. Unless the fuel pump was blown, in which case you're in trouble.
This article *does* seem to imply that any destruction of them will be 100% complete and total. I'm not sure that's true.
"Every airplane flying crashes."
This is false. Many aircraft, even today, use hydraulics for flight controls, and would be capable enough to perform an emergency landing upon total electrical (and even engine) failure. In addition, most aircraft with fly by wire systems have redundancy, so you'd have to blow out all backup systems.
Aircraft close to the EMP blast may have total electrical failure - but further away, it would be feasible that it doesn't blow out everything and it would still be able to perform an emergency landing using the backups.
Cars and aircraft are actually much more likely to survive an EMP blast than household items, due to their metallic exteriors acting as Faraday cages, and due to the fact that they're not connected to the electrical grid (which may be transmitting electrical surges).
If you suspect an EMP is coming, it would be a good idea to unplug everything. The power grid would certainly be transmitting large surges.
"Remember, people aren’t hearing anything from the authorities."
Sure they are. It'll just be mostly local stuff from the mayor and the police. Some radios may still work: An EMP may wipe out a lot, but I seriously doubt it's a 100% guaruntes of destruction of electronics. You may mave 80-90% of electonics wiped out, but I doubt 100%.
"Really large cities away from the coast are dead at this point. "
Okay - I dunno what's with this guy and coastlines. The farmers are gonna have their tractors running pretty quickly, even if they were affected by the initial EMP. There will probably be more food near farlmand areas than at the coasts.
"Conservatively, you’re looking at 40% of the population of the US and Canada has died."
Maybe, maybe not. This is only one way it could happen. It's purely a hypothetical exercise.
A few would hold to their fundamental Christian beliefs, and they would physically die for their efforts.
We've been through worse. Take a look at Rome shortly after the Biblical events.
I think that 'human nature' is basically bad.
That's what fundamental Christian beliefs teach.
My knowledge of electrical physics is not perfect: is it the total length of the wire that determines the energy absorbed, or the distance over land the wire travels?
Total length, with a caveat: If the current is high enough, a voltage may jump across the windings.