"there's no other point of reference to fix your observations to"

You would not need any external observations to determine if your ball was rotating or not, in the same was as a physicist inside one of the funfair rides with a rotating cylinder (and no view of the outside) could determine the cylinder was rotating and the axis of the rotation, by investigating the motion of objects inside the cylinder, so could one on the surface of the ball of jelly, determine if they were rotating or not, and on what axis.

"ultimately this is what GR is all about, right?"

I think no, its not, you may be falling for the "its all relative man" view of the subject.

"Without an enforceable noncompete, a company might inadvertently end up training people who end up working for their own direct competitors. Thus, in that situation, there is a strong disincentive for anyone to provide that training."

In that case the employer can chose to have untrained workers which would not be to anyone's advantage. Make employment attractive enough so that the employer doesn't want to leave, or the original employer pays the leaving employee for a period of gardening leave until their knowledge is no longer cutting edge and not worth passing on. The new employer knows this and knows that it will take n months until they get their new employee.

https://en.wikipedia.org/wiki/Garden_leave

"So, basically, people who lead unhealthy lifestyles who develop lifestyle related illnesses already have to pay more as their injuries are general healthcare related - meanwhile, people injuring themselves accidentally or because of their work get covered for free as a priority."

Out of interest, where does this stand on lifestyle related illnesses caused by healthy lifestyles, say for instance knee injury from running?

I am sure I remember a landrover doing that maybe 10 years ago.

You are assuming that the load is resistive, in most cases with an active semiconductor load the current will not decrease with the voltage, in fact in many cases the current will increase with the voltage decreasing as the active regulators will increase the current to generate the constant voltages the load is requiring.

But even if the load was resistive, lets say we have 12v supplying a resistive load that needs 300w of power, that will need 300/12 A of current, So 25A of current. So lets look as the load and contact resistance as a 0.48R resistor, Initially the contact in the plug may have (lets say) 0.05 ohm, so there is 0.48 - 0.05 = 0.43 ohm in the actual load. So the voltage across the plug is 25 * 0.05 = 1.25v, and the load 25 * 0.43 = 10.75v. So that's 25 * 1.25 = 31.25W dissipated in the contact and 267.W in the load. The load will have active cooling and will be fine with that. Now lets say the contact resistance goes to 0.2 ohm. Now we have 0.43 + 0.2 ohm in total, so 0.63 ohm in total. The 12v supply will then pass 12 / 0.63 = 19A in total. And that will be 19 * 0.43 = 8.17v across the load and 3.8v across the contact. So power is now 19 * 8.17 = 155.23W across the load and 19 * 3.8 = 72.2W across the contact.

The increased resistance of the contact has not reduced the current enough to mean that more power is not dissipated across the contact so contact temperature increase and the resistance increases and it gets worst. Thats with a purely resistive load, which as I said is not the real world case here.

Yep, as ceoyoyo has said, the power supply provides a constant voltage and its not a four wire sense either so it only regulates the voltage at the output of the supply not at the load, the power supply doesn't do anything because of anything. The problem is that as the resistance of the connector increases the voltage across the connector increases (E=I*R, as R increases the voltage increase). This increased voltage across the connector for the same current as before will increase the power dissipation in the connector (P=I*E). The increase in power dissipated in the connector will cause the connector to heat up, and as the connector heats up the resistance will increase more leading to more voltage drop and more power and more heat so it goes from bad to worst to melted. Its the same reason a badly torqued down power connection will fail.

"Even humans do not multitask well at all"

Not true, I am successfully typing this post while breathing, regulating my body temperature, hearing sounds in the background, and any number of other tasks.

"Though I guess if that random song were 4'33" maybe the mp3 could still give ACcodec a run for its money."

The sound of the audience listening to the performance is an integral part of 4'33". Just saying...

"You'll get the carbon into the atmosphere, but nothing else", "it does stink"

You will have noticed that those two statements are in direct contradiction?

"Don't ask probing questions like that. The electriity will magically appear."

So just let me check, are you saying the free market will work to just create the extra supply of electricity as demand increases or are you saying that it will need government to push for that to happen?

"I can imagine what that would feel like"

Given the wavelength in air would be around 350 lightyears lhat seems unlikely.

"So how do you plan on keeping the voltage from overcoming the insulation and jumping to Earth"

You isolate the supply from the earth so its floating, Simple. You then have to worry about the insulation between the two (or more likely three) conductors. But you didn't ask that question.

Actions only have consequences if they happen to an actor (to use your language), however that does not mean that actions can't occur without an actor. So yes, things can happen for no reason.

Would not tidal forces in the bodies also be generating heat so will also take energy from the system. (assuming they are not rotation locked). And of course they would not be the only objects in the universe, so the question of if its really a stable orbit is not so simple.

Do they still make cars with spark plug leads? Most engines I have seen have the coil pack and controller on top of the plug.