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nandomrumber commented on Human brains light up unexpectedly for chimp voices   elifesciences.org/reviewe... · Posted by u/stevenjgarner
nandomrumber · 4 days ago
It’d want to.

There’s probably at least some motivation to be adapted to know when chimpanzees are about.

Those guys are strong and notoriously violent. They don’t seem to mind being cruel either.

If you suspect chimpanzees are around, give them a wide birth.

nandomrumber commented on DeepSeek uses banned Nvidia chips for AI model, report says   finance.yahoo.com/news/ch... · Posted by u/goodway
rhines · 4 days ago
ToS didn't stop the companies that built those models and it won't stop the companies that bootstrap off them. Until an AI company eats a multi billion dollar lawsuit for unlawful data use they will continue to operate this way.
nandomrumber · 4 days ago
Didn’t Anthropic already eat a $1.5 billion lawsuit?
nandomrumber commented on A supersonic engine core makes the perfect power turbine   boomsupersonic.com/flyby/... · Posted by u/simonebrunozzi
pjc50 · 5 days ago
You can't run a turbine 24/7 either, they require maintenance windows.
nandomrumber · 5 days ago
Yes, you can run a turbine 24/7, just not 365 days a year.

For gas turbines, n+1 is probably good enough for up to n=10, then n+2 and so on.

If one breaks down or is undergoing maintenance you have a spare.

Solar can’t work like this. Even if you build 2n solar capacity, you still have a not insignificant fraction of each day with no power.

Meanwhile a gas turbine can be running continuously for week to months between service intervals.

Just add batteries? Ok, but that’s no longer solar, and comes with not insignificant additional costs and maintenance etc.

nandomrumber commented on Are We over the "Jaws Effect?"   nautil.us/are-we-finally-... · Posted by u/fleahunter
askvictor · 5 days ago
Agree. Though I read that shark attacks are increasing. Possibly due to changing water temperatures, or humans over-fishing their natural prey, leading them to look elsewhere.
nandomrumber · 5 days ago
Also, Great Whites were protected some time ago in Australia, 1996 if I recall correctly.

Fair chance there are more of them.

nandomrumber commented on Are We over the "Jaws Effect?"   nautil.us/are-we-finally-... · Posted by u/fleahunter
unsnap_biceps · 5 days ago
People don't get killed regularly

https://www.floridamuseum.ufl.edu/shark-attacks/yearly-world...

There are 4 confirmed fatalities in 2024 and 47 unprovoked bites.

nandomrumber · 5 days ago
So, one chomping a week.

Pretty regular.

nandomrumber commented on A supersonic engine core makes the perfect power turbine   boomsupersonic.com/flyby/... · Posted by u/simonebrunozzi
pfdietz · 5 days ago
> Solar is a tiny portion of new energy capacity in China compared to coal, oil, and gas.

That graph shows production, not capacity, nor installed capacity in each year.

nandomrumber · 5 days ago
Well good, those are the correct numbers focus on because:

Solar capacity and say nuclear / coal / gas / hydro / fuel oil capacity

Are different beasts.

When solar advocates bang on about adding X gigawatts of capacity, they’re being dishonest. What they really mean is they added X/4, because, obviously, it’s sunny only about 25% of the time throughout a year.

Adding batteries doesn’t change that. Still have to over build.

So let’s focus on the numbers that reflect actual production, so we can have an honest conversation.

Nuclear / coal / gas / hydro / fuel oil, even biomass have capacity factors typically about 80%, often about 90%.

Wind and solar are never going up ro those capacity factors, even with batteries (including pumped hydro).

nandomrumber commented on A supersonic engine core makes the perfect power turbine   boomsupersonic.com/flyby/... · Posted by u/simonebrunozzi
AuthAuth · 5 days ago
China's energy buildout is still mostly coal. Go look at the last 20 years how much energy they've added for coal vs solar. Dont fall for the "solar has increased by 500%" trap.
nandomrumber · 5 days ago
You’re absolutely correct.

China didn’t start adding much in the way of solar prior to about 2020, whereas they added lots of coal generation in the past 20 years.

https://en.wikipedia.org/wiki/Electricity_sector_in_China

nandomrumber commented on BMW PHEV: Safety fuse replacement is extremely expensive   evclinic.eu/2025/12/04/20... · Posted by u/mikelabatt
mvkel · 10 days ago
This is what makes Teslas sustainable and other car cos, like Porsche, not.

A battery pack for a Model 3 is $10K. So even if the whole car is only worth $20K, it's still worth keeping on the road.

The Porsche Taycan battery pack is $70K. The moment you have any issue at all with it, the car will be considered totaled.

nandomrumber · 10 days ago
Is that $10k the list price, or have you actually seen a recent invoice from a mechanic for a Model 3 battery swap?
nandomrumber commented on 250MWh 'Sand Battery' to start construction in Finland   energy-storage.news/250mw... · Posted by u/doener
Maxion · 17 days ago
Heath energy required != electricity requirement.

A modern house in Finland needs around 15-24kWh a year of heat energy if it's well insulated. On the higher end for big + northern houses, and less if you're smaller and further south.

Some get this energy by burning wood, others with heat pumps, and some with direct electricity.

nandomrumber · 17 days ago
24kWh is 1kW drawn continuously for 24hrs.

That can’t possibly heat any home for an entire year.

nandomrumber commented on 250MWh 'Sand Battery' to start construction in Finland   energy-storage.news/250mw... · Posted by u/doener
Ndymium · 17 days ago
This is essentially what a ground source heat pump system is. Except instead of a sealed water tank you just make a tall hole that fills with water and the sun will warm it for you during the summer automatically.

1800 kWh is very little. We use around 12000 kWh and our neighbours' new house uses around 8000 kWh annually and most of that is heating. I'm not sure how many houses can hit 1800.

nandomrumber · 17 days ago
A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

https://en.wikipedia.org/wiki/Ground_source_heat_pump

u/nandomrumber

KarmaCake day345April 9, 2025
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The G-force experienced by the Tesla Model S Plaid when accelerating from 0 to 60 mph in 2 seconds is approximately 1.37 G

Bluefin tuna are powerful swimmers capable of extremely rapid acceleration, with one recorded instance showing an acceleration of 3.27 g (approximately 32 m/s²) in bursts, which, if sustained, could equate to speeds of about 232 km/h (144 mph) in two seconds.

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