OptimalConcept143
OptimalConcept143 t1_j1mmpiu wrote
You need extreme amounts of energy to break apart most chemical bonds.
OptimalConcept143 t1_j1hu3ml wrote
Reply to Water pipes frozen in kitchen. Can I unfreeze them with applied heat or is it already too late? by JesseB342
As long as nothing is leaking, you should be okay. Just keep an eye out when it starts to thaw, because ice doesn't leak though pipes obviously.
OptimalConcept143 t1_j0lsacm wrote
Reply to World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A
More corporate green washing. Call me back when planes are using hydrogen sourced from green energies like fusion.
OptimalConcept143 t1_j09maaj wrote
Reply to comment by badalberts in Fusion energy breakthrough and national security implications explained by TheScienceAdvocate
What's impressive is that they are creating as much energy as the ignition process uses. That's a major hurdle to overcome because up until now it has always taken more energy to run than you get out. It's the last step before making more energy than you need to run it.
OptimalConcept143 t1_izzrnoz wrote
Reply to comment by SatanLifeProTips in Scientists have developed a solid-state battery material that doesn't diminish after repeated charge cycles, potentially offering a durable alternative to the lithium-ion batteries used in electric vehicles by unswsydney
That's true isn't it?
I'm still skeptical. I've seen way too many posts about battery tech over the past decade and it never pans out.
OptimalConcept143 t1_izzpvjp wrote
Reply to comment by SatanLifeProTips in Scientists have developed a solid-state battery material that doesn't diminish after repeated charge cycles, potentially offering a durable alternative to the lithium-ion batteries used in electric vehicles by unswsydney
Not true, most consumers list range as their biggest worry with EVs, and if you want max range you either need to have as much energy in as little space as possible, especially since you need space in the vehicle for people and storage.
OptimalConcept143 t1_izzo2fm wrote
Reply to comment by SatanLifeProTips in Scientists have developed a solid-state battery material that doesn't diminish after repeated charge cycles, potentially offering a durable alternative to the lithium-ion batteries used in electric vehicles by unswsydney
Listing it in mass density seems misleading when volume density is what matters in things like cars and phones. Generally with normal conditions solids are less dense in volume than liquids.
OptimalConcept143 t1_izznulk wrote
Reply to comment by mnvoronin in Scientists have developed a solid-state battery material that doesn't diminish after repeated charge cycles, potentially offering a durable alternative to the lithium-ion batteries used in electric vehicles by unswsydney
They listed it in mass density because they don't want you to notice how much greater the volume density is. Solids at human scales will pretty much always be less dense in volume than liquids.
OptimalConcept143 t1_izzl98q wrote
Reply to Scientists have developed a solid-state battery material that doesn't diminish after repeated charge cycles, potentially offering a durable alternative to the lithium-ion batteries used in electric vehicles by unswsydney
Solid state batteries will never have the energy density of lithium ion unfortunately.
OptimalConcept143 t1_ixdmwgu wrote
Reply to comment by MoistPossum in Domino’s Pizza will soon have 800 electric vehicles for delivery drivers by redingerforcongress
This is the same company that irresponsibly tells people to recycle their dirty pizza boxes.
OptimalConcept143 t1_iwr8vn8 wrote
Reply to comment by 69like in What will replace the smartphone? by Competitive_Wish_368
Yes, I can type 98%+ accurate with a keyboard. If I tried to use dictation I would need to waste a ton of time putting in punctuation and fixing the words the voice recognition got wrong. I am also not a sir.
I can't even imagine trying to program using my voice.
OptimalConcept143 t1_iwr703g wrote
Reply to comment by 69like in What will replace the smartphone? by Competitive_Wish_368
Because my fingers are faster than my voice, and brain interfaces that can type make voice dictation look like a good input method.
OptimalConcept143 t1_iwqubz6 wrote
Why would the smartphone get replaced? It's already the best form for the job. It's a bit like asking what will replace the keyboard. Some tech just doesn't need to be replaced with something else.
OptimalConcept143 t1_iwpxljn wrote
Reply to comment by RSomnambulist in Overhyping hydrogen as a fuel risks endangering net-zero goals by filosoful
Batteries can't chemically be as energy dense as hydrogen or fossil fuels. They will improve, but not significantly.
OptimalConcept143 t1_iwptosi wrote
Reply to comment by real_grown_ass_man in Overhyping hydrogen as a fuel risks endangering net-zero goals by filosoful
If we had the ability to create cheap hydrogen you'd probably have enough electricity to just heat homes that way. Especially when systems like heat pumps can get well over 100% efficiency.
OptimalConcept143 t1_iwpo0v5 wrote
Reply to comment by real_grown_ass_man in Overhyping hydrogen as a fuel risks endangering net-zero goals by filosoful
Not true. The energy density of liquid hydrogen ranges from 4.5 MJ/L for low pressure hydrogen gas to 10 MJ/L for high pressure liquid hydrogen. Lithium Ion comes in around 0.93-2.63 MJ/L. You can see that on the Wikipedia article linked in the previous comment.
For vehicles such as airliners there simply isn't another alternative fuel that can replace kerosene, it will be hydrogen.
OptimalConcept143 t1_iwpgktt wrote
Reply to comment by filosoful in Overhyping hydrogen as a fuel risks endangering net-zero goals by filosoful
Hydrogen is the only fuel source that can replace fossil fuels for basically every use. The only reason it isn't doing so right now is because it requires too much energy to produce. If something like nuclear fusion finally happens, this wouldn't be an issue and it would by far be the most efficient and green fuel source possible, and that's from a physics perspective.
https://en.wikipedia.org/wiki/Energy_density#In_chemical_reactions_(oxidation)
As you can see here, hydrogen has more energy density than any other common fuel source, including fossil fuels. It's not a matter of "if" hydrogen becomes our main fuel source, but "when".
OptimalConcept143 t1_j22i9kg wrote
Reply to One of the world's largest lasers could be used to detect alien warp drives by upyoars
It will detect exactly 0 with a 0% margin of error.