Viewing profile — marze

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"Tesla, where we make the impossible late"

Astrophysics

If China had "no regulations" and was building out 100% coal, no one would be worrying that China industry would have an advantage due to low electricity cost vs rest of world.

So I haven't looked through the comments, and assume this has been discussed, but the simple solution is to limit contracts to, say, $4M, and pay only on successful completion. The…

I was interested to learn recently that Alan Turing believed telepathy was a real thing. At least that is what someone wrote.

To me, the interesting question is, were they the first to come up with the concept of communicating while jumping around on a random-like sequence of frequencies. What was the pri…

It may have been 15 minutes to both go down and explore, it mentioned 4 minutes at the bottom. The quote: "15-minute descent and exploration"

It will be interesting to see who owns all the compute hardware in a few years, that cost billions now, and what becomes of it. With an expected useful lifetime so short the deprec…

I find the article unconvincing, although I'm open to being convinced. With historical hindsight, it should be easy to see if the Lamarr et al patent seems novel. Just because an e…

It might just be that there are a lot more cheap pizza locations than fancy ones. This fellow also stays with friends.

My brother has a friend who is the modern day equivalent. He travels North America by bike, eats pizza from cheap pizza restaurant dumpsters.

Once there are 50M electric cars parked here and there, the solution will be even more obvious.

Also, it took 10 and 14 seconds to switch them back on. If it was an accidental switch, you would think it would have been quicker to switch them back.

You mention "brain fart". There is certainly a long history of pilots selecting the wrong lever, or wrong switch. So, it is possible the pilot who denied switching the fuel off tho…

As in, "an electric vehicle fleet that charges during the day and powers the grid at night if the owner opts in"?

Transmission lines are a interesting idea, but expensive. Once solar is cheap (like now, as it already is), you can put in 3x what is needed on a sunny day, and power everything on…

Against the cost of a lower payload fraction. Say you get 4% with TSTO, 2% with SSTO. And if you run into trouble with the design, the SSTO payload moves towards 0%. Your operation…

References?

Wasn't a correlation with elderly drivers and the unintended accretion found in the Toyota cases?

A legal mandate should be made to require this on all motorbikes.

Oops, you're right! So legacy launch vehicles with the exception of Shuttle lift of leisurely.

That is incorrect. Shuttle liftoff thrust was 5.7 million pounds, giving a ratio of 1.25. At liftoff, each SRB produces 2.65 million pounds thrust [1]. Using Wikipedia numbers inst…

Historic rockets around 1.2, including Shuttle, check your numbers. Starship is not a "historic rocket". It and Falcon 9 fly a trajectory that is optimized for something else, not …

That is a trajectory optimized for payload mass, with a set amount of first stage thrust. It is quite typical, historically. It just looks extra slow since the New Glenn rocket is …