Indeed, the inertial-ness of a reference frame is only a local property (local here meaning infinitesimal displacements).

Search providers like google don't just show you links though. They also show you potentially relevant excerpts so you often don't even need to go to the linked site to get what you were after, and show previews of images in image search etc.

Determining exactly where to draw the line of what to consider fair-use for things like this is a highly complex and dynamic issue. Web search engines are (by necessity) parasitic as well but that alone neither makes them bad nor illegal.

Parasitic is also not the "bad" counterpart of symbiotic. A symbiotic relationship is simply a parasitic relationship that benefits both parties. Just saying parasitic says nothing about which side(s) would benefit. I think exploitative would be a more appropriate word to use for such relationships.

A capacitor is essentially two plates of metal separated by a layer of insulator. The antenna is acting like one of those plates of metal, the air is the insulator and (the) ground is acting as the other plate.

Edit: in this specific case the other arm of the antenna is the other plate, if that wasn't obvious.

If you want a more hand wavy explanation I think the antenna is essentially acting as a giant capacitor (or rather one side of a capacitor) which would certainly explain the 90° phase difference between voltage and current as that is exactly what happens with a regular capacitor driven with AC (the exact opposite phase shift happens for an ideal inductor driven with AC).

20 kg is probably not as small an amount as you might think. The energy equivalent of that mass is around 500 TWh of which something on the order of half a percent is released in the reaction IIRC, so say something on the order of 2 TWh worth of energy of which you could extract say 1 TWh worth of electricity (if we assume 50% efficiency which might be optimistic but probably not orders of magnitude off). Global yearly electricity production/usage is currently around 22 TWh so scaling up the production of tritium to meet this demand seems more than feasible to me.

Oh, then yes this translation is essentially done by integrating the pointwise product of the power spectrum of the reflected light times the power response spectrum of each cone cell type separately (you also have to assume a standard for these, as they vary a bit from person to person).

Unlike what some others are saying I don't think such a thing is actually possible, in a strict sense. The reflection transfer function/spectrum of a surface can not be encoded/modeled with just three numbers if you want the resulting rgb output to be correct for any arbitrary light source spectrum. If you always have the same light source spectrum then you can certainly do it.

Edit: The translation from spectrum to rgb values is fairly simple but there is no way to get back the exact original spectrum of the reflected light from just the rgb values alone.