You won't get fires if there is nothing that burns.
So... passengers can't wear clothing or bring any belongings with them that can burn?
Readit Newsbluehawk commented on Elon Musk’s Tunnel Plan Isn’t as Crazy as SpaceX or Tesla bloomberg.com/news/articl... · Posted by u/fmihaila
bluehawk commented on How Did Anyone Do Math in Roman Numerals? washingtoncitypaper.com/c... · Posted by u/iamjeff
I don't understand why the industry is completely focusing on electrical vehicles. It is not inherently clean energy, unless we change how we produce it.
What about the fuel cells driven cars? In my opinion it is still a valid option. You refuel hydrogen and produce water at the end.
Writing this, I recognized that it is probably short-/middle-term money, because electrical cars are quicker to develop (incl. infrastructure).
How do you think the hydrogen is produced? Currently it's either a product of petroleum or produced by using electricity to split water. So your argument of electricity not inherently being clean energy applies to hydrogen as well.
Assuming you use electricity to split water to power your fuel cell, you've basically just made an even more complicated way to use electricity to power your car. So at that point, just simplify it and just use a battery and a motor.
I feel that the rules should contain some examples. I spent a while battling a puzzle to realise that I had been interpretting "No more than two similar numbers next to or below each other are allowed." as "A box must have no more than 2 neighbours of each number" i.e. Exactly 2 0s and exactly 2 1s in the non-diagonal neighbours.
I think that what's being referred to is runs of numbers, so if you see 0,0,_ you know the last one must be a 1
Click on "Tips" at the top. http://binarypuzzle.com/tips.php
bluehawk commented on First Private Moon Landing Gears Up for Launch by Year's End popularmechanics.com/spac... · Posted by u/CarolineW
It's apparently a fully 3D printed engine with an electric turbopump;
"Use of this kind of electric motor system produces a 95%
efficiency as compared to the 50% efficiency achieved
through standard gas-generator cycle engines."
My understanding is that it's just talking about the pumps. 95% of the energy from the battery is turned into rotational energy by a motor in the pumps. This pushes the fuel into the reaction chamber of the rocket engine. Contrast this to a gas-generator cycle that uses some of the fuel/oxidizer to run the pumps. It's not perfect combustion (you don't want it to get too hot) turbines aren't perfectly efficient, etc. so you only get 50% of the energy out of the fuel that you use in the turbo pumps.
However, batteries are heavy. I'm hesitant to believe that electric pumps will scale well to larger rockets, but I would love to be proven wrong.
I humbly submit this magnificent calving:
https://www.youtube.com/watch?v=hC3VTgIPoGU
Mind boggling. A chunk of ice the size of Manhattan rolling over.
That was terrifyingly beautiful!
I wonder if this may be because of the weather, but why can't you grow vines on the metal trees to make it "green"? Or some sort of wall hugging vegetation. I mean, sure its not the same as a tree, but at least it might look nicer.
My guess is that the vanes on the top do something to disrupt the wind and stop it from reaching street level at such high speeds. The vines growing between the vanes could prevent this effect from happening.
> It's because local photovoltaics can save a lot of infrastructure and can require nearly no labor.
No, they don't. You still need almost the entire national power grid to supply your home with night-time electricity... That infrastructure won't be going anywhere.
An even worse outcome will be every home having local power storage infrastructure. Tens, or hundreds of thousands of dollars for a power wall, or a compressed air storage system is much more expensive then maintaining the grid.
Since we are discussing Tesla solar roofs, they suggest your installation comes with a PowerWall, thereby storing power during the day to use at night. I personally don't think we are there yet, but I think the goal is that you don't need the entire national power grid just for night electricity, just a big battery.
I found a scan of the famous Wall Street Journal article about the unfortunate fellow whose jaw fell off: https://www.scribd.com/document/188172930/The-Radium-Water-W...
That was a great read, thanks for providing it! It's interesting that they mention studies in mice about using radiation to cure cancer. Sounds like the beginnings of the discovery of chemotherapy.
bluehawk commented on Better Git configuration blog.scottnonnenberg.com/... · Posted by u/scottnonnenberg
I will never understand why people hate merge commits. It's an accurate history of what happened, and can be useful in tracking down bugs.
It's a trade off. In my opinion when using rebase you don't lose history or make it inaccurate. A bug would still be introduced by the commit that made it, so tracking down bugs with bisect or other tools works the same. The main advantage is that your history is much cleaner.