Locomotives are diesel electric because you cannot make a mechanical power train which get a freight train rolling. You need something with near-infinite torque like an electric motor or a steam engine. And yes, diesel has more energy, partially because it is heavier and partially because C turns into CO2 whereas you need two H per O. More carbon atoms mean higher CO2 emissions of course.

Small diesel engines are not inherently more efficient than petrol engines. They just perform a lot better in practice because they do not suffer so much from partial load. Making a petrol hybrid makes sense because petrol engines hate to run at anything but full load and you solve the lack of torque at the low end. Making a diesel hybrid does not make nearly as much sense since diesel is reasonably efficient at partial load and provides a more acceptable amount of low-end torque.

Diesel engines are large, heavy, and expensive which means less room, mass, and money for batteries.

That makes no sense. As soon as you ask Netflix for the cache, Netflix will steer traffic coming from your customers to the cache, and the cache will do good.

You still need the bandwidth to download each movie once of course.

Economies of scale only makes it better. Yes, you need more than one box for hundreds of thousands of customers, but it is still the cheapest way to get any kind of bandwidth. The cost is completely trivial when you are Verizon-size.

You have to get to Netflix size. Small players pay for everything.

If the ISP is concerned about this, they can just ask Netflix for a caching box. Total cost to the ISP is a couple of ports in a switch, a few rack units, and power. I.e. approximately zero.

The problem is that it doesn't help unless you implement security on your switches as well (private VLAN or similar). One compromised server can take over the IPMI interface and transmit on the isolated network. This is supposed to be impossible; the host is not supposed to be able to use the IPMI interface to source traffic (assuming it has been assigned a dedicated interface and not shared of course). Unfortunately it is not impossible in practice.

I could not find the 109-150GeV range in the original article, but the Higgs that has been found already has a mass around 126GeV. It seems like an additional Higgs in that range should already have been found by the LHC.

Whether math is a product of the physical world or exists independently is a topic for another time. Either way, math cannot stop you from doing anything, you can just pick appropriate axioms which allow you to do what you want. Physics is less forgiving.

Admittedly, the acceleration required to get to the Milky Way centre and back in a day is somewhere beyond 100 billion g, and the power required is more than the output of the Sun, under the assumption that fuel does not have to be carried on the trip. It is a bit optimistic.

60000ly/day, or 0.7ly/s. That is the speed you're measuring inside the spaceship of course. On Earth it will be difficult to measure that you are not actually going at lightspeed.

If you only care about your own reference frame you can pretty much throw relativity out the window, everything works the way it would in Newtonian physics.

There are no limits to how fast you can travel. Physics allows you to go to the centre of the Milky Way and back in a day (well, as long as you avoid the black hole that is probably there). Of course the Earth will be somewhat older when you return, but for you only a day has passed.

Yes it sucks to lug two devices around. Alternatively, use a cheap 4G phone as the 4G hotspot.

Alas, electronics have not yet advanced to the point where it is reasonable to have one phone with support for all combinations of bands and technologies.

I have not claimed it is difficult. You did not correct my reading.

Nothing limits you to one bit-per-second per baud. 9600 bps modems were, IIRC, 2400 baud with 4 bits per Hz. (Higher than that it got a bit shady because they started optimizing for being encoded in a digital phone line).

VDSL2 goes up to 32768-QAM, which is 15 bits per symbol. I do not know whether any actual phone lines exist with a sufficient signal-to-noise-ratio to make that coding useful.

So you know that Huawei devices are back-doored because they are knock-offs of back-doored devices from Western manufacturers?

I must have read that wrong somehow.

I am glad that the satellite was saved. However, why is it good to avoid man-made impacts with our moon?