1958325146

6 ms·

1.
by 1958325146 4y ago
You can relatively easily install solar panels/batteries, and they even pay for themselves while we await doomsday.
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by 1958325146 4y ago
Can anyone tell if this architecture makes sense to ship in their actual cars to replace whatever is doing the computation there now? That is the only way I can see this making any sense to develop.
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by 1958325146 4y ago
I'm not sure if this is the point you're trying to make or if you're implying private companies aren't up to it, but... the other launcher of the same class, which will probably be launching within a year and is much mor
4.
by 1958325146 4y ago
That video uses a pretty strange calculation to estimate the battery weight. Here is a different way: 500 mile range * 2 kWh/mile means they need a 1000 kWh pack. The most recent packs they are shipping (Texas Model Y) are 543 kg [1] f
5.
by 1958325146 4y ago
You are right to be confused about that claim, but it because the units of the claim have been mixed up. The actual claim is 2 kWh/mile. That is a measure of energy per distance, kind of like gallons per mile. If a truck is using 2 kWh
6.
by 1958325146 4y ago
I ran into the case of needing to back up a write-heavy database without blocking anything, and came up with a solution: Writing a VFS ( https://www.sqlite.org/vfs.html ) that makes the application move the Sqlite journals
7.
by 1958325146 5y ago
My house is set up like you describe. The whole solar/battery system never interconnects with the grid, and is instead set up like a generator. There is a transfer switch to choose between "generator" power and grid power. If
8.
by 1958325146 6y ago
For pressure vessels like rockets, the mass of the structure and the mass of the fuel scale together as far as square-cube reasoning goes. The surface area of the structure scales with the square while the volume of the fuel scales with the
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by 1958325146 6y ago
Here is a graph of Texas's generation by source during that time and the surrounding time. It seems borderline dishonest to have an article about this topic not include this. The sharp dip in the middle on the image (the beginning of F
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by 1958325146 6y ago
Just to clarify: this is about insurance for the payload , not the booster. So, the insurance costs only depend on how likely the insurance company thinks it is for the satellite to be blown up and how much the satellite costs, not how muc
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by 1958325146 6y ago
I bet the Massachusetts one you are thinking of is Ambri, which is making a liquid metal battery. https://ambri.com/
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by 1958325146 6y ago
If you expected most billionaires to get into rocketry, you would expect there to be hundreds or thousands of rocket companies given the more than 2000 billionaires around.
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by 1958325146 6y ago
I couldn't find the quote in your citation 1 so I looked it up.x "...we're closely following the terrible events unfolding in Charolottesville, Virginia. We condemn in the strongest possible terms this egregious display of ha
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by 1958325146 6y ago
Didn't we see the shoe on the other foot, roughly, in 2016 with the Russia collusion thing?
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by 1958325146 6y ago
The latest we have is that it will sweat only where the heat shield can't hold up on its own: https://twitter.com/elonmusk/status/1107380559834046465 .
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by 1958325146 6y ago
In the US, Telsa no longer receives any federal tax credit as of January 2020. A few states (including California) still have incentives. In any case, losing the tax credit doesn't seem to have slowed them down.
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by 1958325146 6y ago
Imagine cutting a cylinder in half from top to bottom, then taping the halves back together. As you spin it, the tape has to stop the two halves from flying apart. If you make the cylinder bigger and keep the centripetal acceleration the sa
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by 1958325146 6y ago
Page 9 of https://www.tesla.com/ns_videos/2019-tesla-impact-report.pdf has a chart for that (Average Lifecycle Emissions in New York State (gCO2e/mi)). Electric: 54 in manufacturing, 74 in use Gas: 45 in manufactu
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by 1958325146 6y ago
I charge through a ~40 foot long 120V "extension cord" made of 10 gauge wire and plugged into an appropriately rated outlet. Which is to say, you probably could charge in your garage if you really wanted to.
20.
by 1958325146 6y ago
I see. For a regular gas car, the 4 miles per kWh is wildly optimistic -- 134 miles per gallon. The kWh per mile (just from tank to wheels) would be something like 4 times higher than that. (1 kWh per mile = 33 miles per gallon). So that 8.
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by 1958325146 6y ago
Where does your estimate of 50 kWh per day come from? According to [1], Tesla's 2017 manufacturing and delivery released 186000 metric tons of CO2, most of that "indirect" (as in at their suppliers). (146000 for "Facilit
22.
by 1958325146 6y ago
Sorry, you have to append a period to a URL to make it work. HN does not believe in URLs that end in periods, apparently.
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by 1958325146 6y ago
It looks like an iron-based chemistry: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=... .
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by 1958325146 6y ago
You are comparing - Case A: Donald Trump runs his companies starting at year X and meanwhile leads a lavish lifestyle, ending up with N1 dollars. - Case B: Donald Trump puts all his money in index funds and spends nothing, ending up with N2
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by 1958325146 6y ago
> He could have been vastly more wealthy today by doing nothing other than invest in index funds, which to me counts as largely unsuccessful. Isn't that unknowable without knowing how much he has spent along the way?
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by 1958325146 7y ago
If we're talking about schedule slip: the schedule is a flyby of (not landing on) the moon in 2023 (not 2022). https://en.wikipedia.org/wiki/DearMoon_project
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by 1958325146 7y ago
Thank you!
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by 1958325146 7y ago
I am just learning about this reaction, but can anyone explain what is wrong with the following naive idea? - Fire a stream of hydrogen ions with a particle accelerator at a chunk of Boron 11. - The hydrogen and boron combine and release h
29.
by 1958325146 7y ago
Where are you getting 175kW for a Model 3? A standard model 3 uses 25 kWh per 100 miles according to [1]. If we assume it is traveling at 50 mph, that is 12.5kW continuous https://en.wikipedia.org/wiki/Tesla_Model_3#Spe