Trellmor

These things just plug into a power outlet. Requirement for Austria is a Smart Powermeter, because the old, analog ones would run in reverse if the solar panels produced more then you are currently using. They may not exceed 800W and are required to turn off if no power grid is detected, e.g. during a power outage. Apart from that, just institutional conservatism and inertia as far as I know.

It's also cosmology, but for what it's worth, the solar system is moving at about 230km/s around the milky way so you could say every one of us is moving at such a number.

Rocket and jet engines are sometimes called Raketentriebwerk and Turbinentriebwerk respectively.

He is currently working on the 3rd evolution of the marble machine and posts build updates on this YouTube channel. Interesting intersection of music and machining content.

This is what I'm using, Shield => HDMI => TV => Optical => Soundbar. There are some settings on the TV to enable external speakers over optical, which format is sent (Dolby Digital, etc), and which format is accepted (bitstream) that you may need set. The Shield also has settings for which signal is sends. Works well for me after configuring it and I get Dolby Digital 5.1 (ac3 5.1) from my Shield to my LG C2 to my soundbar over optical.