asdfadsfgfdda

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31.
by asdfadsfgfdda 6y ago
I think it was purging leftover hypergolic fuel, which is used to ignite the engines. Or, maybe the engine sensed the engine was abnormal (because of low fuel), so it tried to re-ignite. https://en.wikipedia.org/wiki/Tr
32.
by asdfadsfgfdda 6y ago
The obesity rate could explain a lot, obesity is a major factor in covid risk. USA obesity rate is 40%, Sweden is 10%.
33.
by asdfadsfgfdda 6y ago
How's this for an argument against corporate taxation: Corporations receive money from customers, and distribute to employees (salaries) and investors. It's just simple arithmetic. How does a tax on corporations impact these three
34.
by asdfadsfgfdda 6y ago
I think it could scale. If you can directly transfer mechanical stress from the cable to the earth, with no concerns over vacuum or thermal insulation, the economics might work. Even if you can only store ~1 Wh per kg of enclosed rock, it s
35.
by asdfadsfgfdda 6y ago
For a company that made $180 billion in revenue, $16 million is only .009%. I'm not denying that lobbying is effective, but there's clearly a limit. There are probably thousands of individual government regulations that each could
36.
by asdfadsfgfdda 6y ago
Energy storage would be pretty useful, the efficiency could be even better than batteries: https://en.wikipedia.org/wiki/Superconducting_magnetic_energ...
37.
by asdfadsfgfdda 6y ago
You could argue that traffic fatalities tend to be younger victims, at least compared to COVID victims. So the number of life-years might be a better comparison. But this still doesn't resolve fundamental questions, like how much &quot
38.
by asdfadsfgfdda 6y ago
The fact that PG&E is clearly advocating for electric cars should give everyone pause. Gasoline cars can be filled by gas from any company, so there's actual competition. But an electric car mandate will expand PG&E's mono
39.
by asdfadsfgfdda 6y ago
The layout/payload may be similar to a TBM, but I'm guessing the wing loading and cruise altitude will be higher. So it's definitely feasible to go faster on less power.
40.
by asdfadsfgfdda 6y ago
The main "why" is a carbon-free fuel (when produced by solar) in a relatively dense form. Liquid ammonia has higher energy density than liquid hydrogen, is easier to store, and is already used a bulk chemical around the world. It
41.
by asdfadsfgfdda 6y ago
A Model 3 is smaller than the average car, it should be compared to something like a Honda Accord hybrid. Both have a similar cabin volume of ~100 ft^3. The fuel economy for a hybrid Accord is 48 mpg, or 760 Wh/mile. The Accord is also
42.
by asdfadsfgfdda 6y ago
Jet fuel is ~36 kWh/gallon raw energy density (13 kWh/gallon mechanical power assuming 35% engine efficiency). The pre-covid jet fuel price was $2/gallon, or $.15/kWh. The average price of commercial electricity is $.06&
43.
by asdfadsfgfdda 6y ago
A PW150 turboshaft engine is ~5 kW/kg. Some electric motors are up to ~10 kW/kg. But, as an example, engines on a Q400 regional airliner are only ~5% of the total weight. Fuel is up to 15% of total weight. So the savings are not s
44.
by asdfadsfgfdda 6y ago
Tesla's factory was the very first foreign-owned car plant, without a domestic partner. This certainly has not been the norm in China in the past 30 years: https://www.scmp.com/business/companies/article/
45.
by asdfadsfgfdda 6y ago
Flight plans are filed in advance, but a flight plan is just a plan. It's an impossible task to predict where an airplane will fly in advance, there are so many variables involved. Just some of the many reasons a flight will vary from
46.
by asdfadsfgfdda 6y ago
The act of controlling a plane can be done entirely by looking at gauges, but that's not the only thing a pilot does. Pilots are also interfacing with ATC, flight attendants, dispatch, maintenance, and passengers. Even if you replace t
47.
by asdfadsfgfdda 6y ago
A medium helicopter charter might be $1200/hour, SF to Tahoe is ~130 nm, so ~1.5 hours each way. Of that $1200/hr, $150/hr is fuel, $50/hr is engine maintenance, and maybe $100/hr airframe maintenance. These scale l
48.
by asdfadsfgfdda 6y ago
Yeah its basically optimized to look bad. The satellites are relatively close to each other. In normal operation, there's no reason to have 30 different satellites in view. I suspect these satellites were very recently launched, so the
49.
by asdfadsfgfdda 6y ago
1. The market cap of SP500 companies is ~30 trillion dollars, significantly larger than the entire stock markets in Japan, China, and Germany combined. 2. SP500 companies earn ~40% of revenue from outside the United States
50.
by asdfadsfgfdda 6y ago
Natural gas is not slightly better, it's significantly better than coal for climate. Emissions are about half as much as coal per kWh. Switching from coal to natural gas has probably reduced America's CO2 footprint more than all n
51.
by asdfadsfgfdda 6y ago
Here's a video from the company that built the new handrail: https://www.youtube.com/watch?v=N-XCbsyRENI From your article: "The wind retrofit project is designed to make the Bridge more aerodynamic under high win
52.
by asdfadsfgfdda 6y ago
The original data is probably from SEC disclosures, as required by the Dodd-Frank Act. https://www.sec.gov/news/pressrelease/2015-160.html
53.
by asdfadsfgfdda 6y ago
Does this include dividends in returns? Most senators are older (closer to retirement), I am assuming they invest more in dividend stocks and bonds than growth stocks.
54.
by asdfadsfgfdda 6y ago
This may surprise you, but the fuel burn for holding is essentially constant vs altitude. What suffers is the range, flying at low altitude is much worse for fuel range because at high altitude, true air speed increases for a given indicate
55.
by asdfadsfgfdda 6y ago
Imagine how much processing power is needed to analyze radar signals or camera images. If you can process more efficiently, your cooling system and electrical generator can be smaller, which saves mass for more fuel or more payload.
56.
by asdfadsfgfdda 6y ago
Strong UV will damage plastics in the interior. Instead, the airlines have started using an electrostatic sprayer to decontaminate planes: https://www.youtube.com/watch?v=O1gdRYpI1LU
57.
by asdfadsfgfdda 6y ago
The cabin air is about half recirculated, half fresh air from the engines. But the recirculated air is filtered. An N95 mask can filter >95% of .3 micron particles, this cabin air filter can capture 99.9%. https://www.ptitechn
58.
by asdfadsfgfdda 6y ago
Prices wouldn't significantly change. You still have people/pension funds/governments with lots of money to invest (the people who currently buy mortgage debt). How would you prohibit this money from just buying houses and re
59.
by asdfadsfgfdda 6y ago
Every single industry is currently trying to get the attention of the government, like restaurants, airlines, petroleum, retail, hotels, etc. This ad is trying to drive the public's attention on food security, so the meat industry can
60.
by asdfadsfgfdda 6y ago
From my estimate, they produce plastic resin in pellet form. Imagine a material that is like coarse plastic sand. If you are making a respirator mask, another factory will take these pellets, heat it to melting, and basically spray the hot

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