sacred_numbers

8 ms·

31.
by sacred_numbers 4y ago
Another thing to keep in mind with solar is that so far we have been optimizing primarily for cost, rather than land use. This means installing panels at a high angle, far apart from each other to minimize shading and maximize energy captur
32.
by sacred_numbers 4y ago
Reverse osmosis desalination does have some capital and operational costs, though, but you're not far off. 5 billion m^3 or 4 million acre-feet would still only be about 2.5 B per year. The problem is that if you fill up the Colorado
33.
by sacred_numbers 4y ago
What I mean is that a solar panel of any given size will produce electricity that can be used to desalinate an order of magnitude more water than a device like this of the same size. The device in this article desalinated 5.8 liters per sq
34.
by sacred_numbers 4y ago
This is incorrect. The statistic of 5.8 liters per hour is actually liters per hour per square meter. A 10x10cm panel would produce 58ml per hour in full sun. If you instead put a solar panel with 20% efficiency and used the electricity f
35.
by sacred_numbers 4y ago
I forgot to add the sources earlier. Here they are now: [1]: https://rapports.gva.ch/rdd/2019/en/Article/minimiser-l-empr... [2]: https://www.eesi.org/papers/view/fact-sheet-the
36.
by sacred_numbers 4y ago
According to this source [1] flights departing GVA generated 1.3 million tons of CO2 in 2018. According to this source [2], jet fuel generates 3.16 kg CO2 per kg of fuel. Multiplied by approximate fuel density and we get 2.57 kg CO2 per li
37.
by sacred_numbers 4y ago
The main problem is that -- especially with laser fusion-- you are not inputting 1 unit of electricity and getting out 1.2 units of high grade heat. You are inputting 100 units of electricity, most of which is lost as low grade heat throu
38.
by sacred_numbers 4y ago
Literally the next paragraph says: “The scale and proportions of these food lists strongly suggests that they were provisions for occasional grand feasts, and not general food supplies sustaining royal households on a daily basis,” says Lam
39.
by sacred_numbers 4y ago
They are not necessarily lying, but they are clearly an outlier. My spending is maybe a few percent higher and prices for some of the things I buy are even down recently. Everyone has a different experience, which is why we have aggregate s
40.
by sacred_numbers 4y ago
Price levels actually did drop compared to June. If anything I bet people are more likely to interpret this incorrectly by believing that prices are still rising compared to last month, just at a lower rate. They are not, it's just th
41.
by sacred_numbers 4y ago
The carbon source is CO2 in the air. Digesting the food creates CO2, which completes the cycle of carbon neutrality.
42.
by sacred_numbers 4y ago
I think that chart shows that things are going back to normal. The reason weekly earnings were at an all time high in q2 of 2020 is because the low wage earners all got laid off because of the pandemic. Now that things are going back to nor
43.
by sacred_numbers 4y ago
I have never understood that sentiment. If you define long term energy storage as being able to discharge at max power for a day or a week you are penalizing superior storage technologies for no reason. Let's say that you have two te
44.
by sacred_numbers 4y ago
I see so many people talk about the Boots theory, and while I don't disagree, there's another side to the story. What if you buy a really nice pair of boots that will last a lifetime and then a couple years later you move to a bea
45.
by sacred_numbers 4y ago
According to the source, "Current man-made and natural ISA emissions total over 100,000 tonnes and have many beneficial climate effects". They are not advocating for doing anything particularly new, just scaling up those (partial
46.
by sacred_numbers 5y ago
A single patient may receive multiple prescriptions per year, so the number of patients will be lower than the number of prescriptions. According to this source the number of patients taking metformin is 17 million. https://clinc
47.
by sacred_numbers 5y ago
The price for beef is probably per libra (323 grams) and the price for chicken is probably for a whole chicken.
48.
by sacred_numbers 5y ago
According to this source[1], the average student loan debt for a new 4-year graduate in 2020 is $28,400. Of course, this is highly variable depending on the student, but $150-200k is not typical for a 4-year degree. [1]: https:/&#x2F
49.
by sacred_numbers 5y ago
That was my thought at first as well, but thinking about it more, if abusers find out that genetic testing is routinely happening they will just not allow the victim to receive medical treatment at all, which would be worse for the victim t
50.
by sacred_numbers 5y ago
I think the person you are replying to is suggesting using PV panels to heat a thermal mass (using resistive heating or possibly a DC heat pump) to avoid the expense of an inverter and other electronics necessary to connect to the grid. Thi
51.
by sacred_numbers 5y ago
Clostridium botulinum is anaerobic, and live in soil, so living humans are not a particularly good host. Dead humans could be, though, so natural selection would favor strains that efficiently returned themselves and their descendants back
52.
by sacred_numbers 5y ago
The only risk is losing out on greater gains from investing in a higher yield asset. Keep in mind that the yield on these will probably drop in 6 months, since the dividend is adjusted semiannually. If inflation keeps going the dividend wi
53.
by sacred_numbers 5y ago
It may have been a judge that appointed the firm, but it's kind of suspicious that he would appoint a firm that had previously represented Chevron to represent the US Government. That seems like a pretty big conflict of interest.
54.
by sacred_numbers 5y ago
Maybe the researchers meant 230 Kwh above the reaction energy of pure carbon and oxygen. That makes the math check out, since 2,485/(2485+230)=91.5%, which could be rounded up to 92%. It would also square up with the estimated costs of
55.
by sacred_numbers 5y ago
Currently it's actually the opposite in some ways. Vehicles with a GVWR of at least 6000 lbs (2700kg) that are used for business can be deducted 100% in the first year, no matter what the business use is. This leads to a lot of white
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by sacred_numbers 5y ago
Their system is designed to easily start and stop to take advantage of wholesale wind and solar electricity rates, which are more like $0.02/kWh during certain parts of the day and times of the year. They sacrifice uptime for even che
57.
by sacred_numbers 5y ago
Monopolies are often created through innovation, either through lowering costs or increasing quality above competitors. Carnegie Steel, for example, used the Bessemer process to drastically lower the cost of steel and thus drive competitor
58.
by sacred_numbers 5y ago
To be fair, cow's milk is also about 90% water. You're right, though, that the ingredient cost using commodity oats and rapeseed oil should only be about 4-5 cents per liter. The price of cow's milk, on the other hand, is a
59.
by sacred_numbers 5y ago
There's no environment in space, so displacing heavy industry on Earth (which does have an environment) with industry in space would theoretically be a good thing. This depends on exactly where in space you do this, though, and the num
60.
by sacred_numbers 5y ago
Your estimate is off by an order of magnitude. An 18650 cell with 11 watt hours of capacity would have about 0.9 grams of lithium. A kg of lithium could create around 12 KWh of batteries, which would store 12,000 KWh based on 1,000 cycles.

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