JohnDClay

joined 2 years ago
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[–] JohnDClay@sh.itjust.works 4 points 1 week ago

They did some testing with it, but I don't think it is fully qualified.

[–] JohnDClay@sh.itjust.works 17 points 1 week ago (8 children)

They're the only planes that can carry the biggest bunker buster massive ordinance penetrator.

[–] JohnDClay@sh.itjust.works 0 points 1 month ago (2 children)

Sources? Anyway, to get a good sized grid to smooth out intermittency, you'll need to connect all Europe or more. I think there's already some of that, but the longer distances you go, the more loss. I agree pumped hydro is a good option, but the promising sites tend to be quite limited when you try to scale up to a full grid. Plus the ecological concerns that come with dams need to be weighed too.

[–] JohnDClay@sh.itjust.works -4 points 1 month ago (1 children)

Finite resource goes for battery minerals even more so, and solar production capacity is also limited.

Agree on offshore wind, but it's also got intermittency.

You can save money with solar and batteries, but only after about 30 years. That's a much longer payback time than any other forms like nuclear. Plus you wouldn't have representative grid loads overnight.

The costs you cited are just for the panel electricity, not taking into account any storage.

Right now it costs about $400/kwh. You'll need about 12 hours storage to cover over night, which means about $50k/kw. If the lifespan is 20 years, (which is generous) that means the added cost is 28 cents per kwh just for the storage. I'm sure the batteries will get more efficient, but they will also be in more demand, so that price could go up or down.

Do you have better numbers showing 100% solar is cheaper than nuclear? Why is nuclear bad? It's less deaths than even wind energy and is a proven technology to minimize emissions. Why limit yourself?

[–] JohnDClay@sh.itjust.works 2 points 1 month ago

I have no idea. But maybe the gravitational location would appear to asymptotically approach the event horizon similar to how light from an object would appear to just approach the horizon and then stay there.

[–] JohnDClay@sh.itjust.works -4 points 1 month ago (5 children)

I'll need substantiation on the cheaper. Batteries are expensive! And transmission loses get excessive after very long to distances.

[–] JohnDClay@sh.itjust.works -2 points 1 month ago* (last edited 1 month ago) (6 children)

Batteries plus solar to equal a constant output power is much more expensive than nuclear. It's when you have other sources that you can have less storage that solar gets cheaper.

[–] JohnDClay@sh.itjust.works 8 points 1 month ago (7 children)

It's still to be determined if at a 90% renewable grid whether adding nuclear or wind/solar will be cheaper. You'll need a whole lot more energy storage the closer you get to 100% intermittent renewable, so having some reliable base load with nuclear is likely cheaper.

[–] JohnDClay@sh.itjust.works 8 points 1 month ago

You have your profile set to public? Why not just share with your friends?

[–] JohnDClay@sh.itjust.works 2 points 1 month ago (1 children)

If you insist. Would you be so kind as to stop commenting on my comment then as well?

[–] JohnDClay@sh.itjust.works 1 points 1 month ago (3 children)

Why do you do this?

[–] JohnDClay@sh.itjust.works 1 points 1 month ago (5 children)
 

Went on a hike, they loved the sticks, so many to chose from!

1
submitted 1 year ago* (last edited 1 year ago) by JohnDClay@sh.itjust.works to c/stick@sh.itjust.works
 

Just make sure to return them when you're done! Maybe even add a new one if you find one.

The one I used was very nice. Has a nice heft all the way down, and was very straight.

 

cross-posted from: https://lemm.ee/post/29486021

cross-posted from: https://lemmit.online/post/2665486

this intricate pattern on a stick found while hiking in sedona, az

This is an automated archive made by the Lemmit Bot.

The original was posted on /r/mildlyinteresting by /u/delayed_milk on 2024-04-15 04:56:39.

 

Jean-Pierre Luminet calculated all of that back in 1979 using the IBM 7040 mainframe, an early transistor computer with punch card inputs. The machine generated isolines for his image that were "directly translatable as smooth curves using the drawing software available at the time," he told Engadget in an email.

To create the final image though, he relied on his other passion: art. Using numerical data from the computer, he drew directly on negative image paper with black India ink, placing dots more densely where the simulation showed more light. "Next, I took the negative of my negative to get the positive, the black points becoming white and the white background becoming black."

https://www.engadget.com/2017-04-19-black-hole-image-jean-pierre-luminet.html

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