Haleakala on Maui has probably had historical eruptions, so it could probably provide geothermal power (natives willing). Kauai is pretty dead, though.
Typically salt domes are used for storage. At high enough pressure to be usable the salt melts. Rocks and steel would eventually, too. If you extract the heat you are subject to the Carnot limits to efficiency. Batteries avoid this.
Ok, now I feel dirty. Using 'Carnot' in a general discussion feels wrong.
It's not so easy. Compress air enough to be useful and it gets too hot to contain. Bleed off the heat and you get inefficiency. Still, the losses might be kept low enough for it to work eventually. Just not yet.
It sounds like they only had one backup, and that promptly got overwritten. It should be standard procedure to have an offsite backup as well. I always did.
Consumer Reports' testing showed a problem, so they did not recommend it. Once they understood the cause of the problem they could see it would not affect normal users, so now they do recommend it. It's good that Apple is planning a fix, but CR would have changed their rating anyhow.
Yes, the old dark matter for EM drive propulsion proposal. It's an obvious idea, and one that I thought of independently only to quickly find that I wasn't the first one to think of it. I'd still rate it as unlikely, but it's a possibility to keep in mind.
That would be interesting if Tamino himself had been an actual scientist, publishing his rebuttal in a peer reviewed journal.
Tamino is Grant Foster, a statistician who does publish in peer reviewed literature. In my opinion, this will likely be published unless someone else beats him to it. That will at best take a long time, while this can show up immediately.
...the Earth has been warming since the last ice age.
The Earth was slowly cooling for the last 5,000 years or so, right up to when humans started adding large amounts of carbon to the atmosphere. Thank goodness for that, but now we're warm enough.
Colorless is one end of the spectrum. The fancies, the red, blue and even solid yellow ones can cost even more. This is another opportunity for synthetic diamonds.
A parking spot should be well under the cost of an apartment. Use aluminum instead of copper for the wiring, or once standardized, put in wireless charging.
If your plumbing getting stolen is a problem you have bigger problems than I can handle. Move out if you can.
I love how you say "normally" when the vast number of people who have cars live in apartments where it may not be "normal" to have a plug anywhere near the car at night.
It will take a long time, but what we need are construction rules that require a parking place with access to power for each new apartment. Some effort has already gone into this but it's still just beginning.
No, and the summary gets it wrong, too. In the early universe the galaxies were smaller, so there were more of them. The number of stars and the mass of dark matter hasn't changed.
Actually, while there is a case for not using coal just to produce energy, producing metals out of their ores is a very valid use of coal. As it is, that carbon dioxide is trapped in the mines...
Refining iron releases a significant amount of carbon dioxide into the air. Iron ore, ferrous or ferric oxide, is heated with coke, which come from coal. The reaction produces iron and carbon oxides. We normally just let the carbon oxides go. Capturing them might be possible, but it isn't easy.
More promising is to substitute hydrogen or electricity for the coal, but this is still in the early stages of development. It should work, but iron will probably get more expensive.
Planes and rockets are the only tough bits. We can electrify cars and trains with no problem. Iron refining and cement are only a little more difficult. At least that will give us more time to work on the planes.
Slashdot Mirror
Haleakala on Maui has probably had historical eruptions, so it could probably provide geothermal power (natives willing). Kauai is pretty dead, though.
Umm, maybe. What is RCS?
On Linux it is becoming more and more difficult. I use a dark background with yellowish text but it is hard to find the settings on new installs.
Typically salt domes are used for storage. At high enough pressure to be usable the salt melts. Rocks and steel would eventually, too. If you extract the heat you are subject to the Carnot limits to efficiency. Batteries avoid this.
Ok, now I feel dirty. Using 'Carnot' in a general discussion feels wrong.
Adiabatic compression is close to 100% efficiency, although you lose some due to friction. If you have to recover heat your efficiency goes down.
There is but you lose efficiency.
It's not so easy. Compress air enough to be useful and it gets too hot to contain. Bleed off the heat and you get inefficiency. Still, the losses might be kept low enough for it to work eventually. Just not yet.
It sounds like they only had one backup, and that promptly got overwritten. It should be standard procedure to have an offsite backup as well. I always did.
Consumer Reports' testing showed a problem, so they did not recommend it. Once they understood the cause of the problem they could see it would not affect normal users, so now they do recommend it. It's good that Apple is planning a fix, but CR would have changed their rating anyhow.
Yes, the old dark matter for EM drive propulsion proposal. It's an obvious idea, and one that I thought of independently only to quickly find that I wasn't the first one to think of it. I'd still rate it as unlikely, but it's a possibility to keep in mind.
Nine kelvins, or are you using the obsolete and unspellable faranheight units?
The world was in a cooling trend before the industrial revolution. There is no other plausible reason for it to change right now except for us.
Tamino is Grant Foster, a statistician who does publish in peer reviewed literature. In my opinion, this will likely be published unless someone else beats him to it. That will at best take a long time, while this can show up immediately.
Tamino makes a good case that these researchers are mostly wrong.
The Earth was slowly cooling for the last 5,000 years or so, right up to when humans started adding large amounts of carbon to the atmosphere. Thank goodness for that, but now we're warm enough.
Colorless is one end of the spectrum. The fancies, the red, blue and even solid yellow ones can cost even more. This is another opportunity for synthetic diamonds.
A parking spot should be well under the cost of an apartment. Use aluminum instead of copper for the wiring, or once standardized, put in wireless charging.
If your plumbing getting stolen is a problem you have bigger problems than I can handle. Move out if you can.
It will take a long time, but what we need are construction rules that require a parking place with access to power for each new apartment. Some effort has already gone into this but it's still just beginning.
Monty Python's Prejudice
No, and the summary gets it wrong, too. In the early universe the galaxies were smaller, so there were more of them. The number of stars and the mass of dark matter hasn't changed.
Humans: 35,900 million tons of carbon dioxide in 2014 from fossil fuel burning.
There is an enormous amount of gasses released. As I said, it isn't easy, but it may be possible.
Cement isn't identical with Portland Cement, although there are proposals to reduce the carbon dioxide emissions from making that, too.
Another way to go is a magnesium silicate based cement.
There's a lot that needs to be done to get us close to carbon neutral, but it's doable and we need to get started.
Refining iron releases a significant amount of carbon dioxide into the air. Iron ore, ferrous or ferric oxide, is heated with coke, which come from coal. The reaction produces iron and carbon oxides. We normally just let the carbon oxides go. Capturing them might be possible, but it isn't easy.
More promising is to substitute hydrogen or electricity for the coal, but this is still in the early stages of development. It should work, but iron will probably get more expensive.
Planes and rockets are the only tough bits. We can electrify cars and trains with no problem. Iron refining and cement are only a little more difficult. At least that will give us more time to work on the planes.