bluehawk

So... passengers can't wear clothing or bring any belongings with them that can burn?

They mention this in the article, and say there is very little evidence of this being common in ancient Rome.

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.

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.

That was terrifyingly beautiful!

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.

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.

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.

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.

The boosters were actually parachuted back down to earth and reused. Though the general consensus is that it didn't save any money, and may have been more expensive than if they had just been disposable.

Did you really? The fifth paragraph defines it:

"The chronically homeless, on the other hand, are a subset of the homeless population that is often the most vulnerable. These are people who have been living on the streets for more than a year, or four times in the past three years, and who have a "disabling condition" that might include serious mental illness, an addiction or a physical disability or illness."

I can sorta understand how he got there. Historically, making a car company is very, very hard. It's a tough industry to crack into. So when you see a startup car company with a hugely inflated stock that has a (based on historical data) very low chance of success, it makes a lot of sense to bet against it. But as it succeeds, you have to keep doubling down on the idea that it can't possibly deliver on it's promises and will fall on it's face eventually. At some point he slipped from making a reasonable bet to frothing at the mouth a bit.

That's a bold assumption about his accidents being his fault. Maybe he was rear ended at a light when fully stopped. And even if he was going slower than traffic, it's still the other driver's job not to hit other cars.

It's common for cards to have a roughly $99 yearly fee that gives you nothing other than the ability to have the card. It's a stretch, but I don't think it's dishonest to say the card is free* . *With an Amazon Prime membership.