namirez

14 ms·

121.
by namirez 7y ago
I don't know what happened here, but if I remember correctly, in rockets, safety factor is typically smaller than 2 or the design would be too heavy. But I guess the safety factor for pressure testing is 4. Source: article 6.8.2.2 of t
122.
by namirez 7y ago
The title is totally misleading. A wealth tax by definition is designed to be over 100%. For example, if you have $1000 and you don't make any money whatsoever and get taxed at 1%, you have to pay $10. In this hypotethical case, your i
123.
by namirez 7y ago
I think you are misrepresenting her comments. It seems the comment about running is in the context of workout; she has a choice to run along roads or in parks. The comment about cycling, on the other hand, sounds to be related to daily comm
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by namirez 7y ago
> If an article whose message is basically "Toxic particles are everywhere, unavoidable, pragmatically undetectable, and they're killing you" isn't fear mongering, then I don't know what is. The article is prop
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by namirez 7y ago
Technically you're talking about sublimation rather than evaporation. And no, it won't be very likely for the Voyagers to disappear. Most likely they will be damaged by impact or get absorbed by massive object, but sublimation at
126.
by namirez 7y ago
My bad, but I'm curious; how do you generate power in a wind tunnel?
127.
by namirez 7y ago
What others said, plus the fact that most municipalities don't allow it. As a rule of thumb, the distance from a turbine to a permanent structure must be larger than the height of the turbine.
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by namirez 7y ago
Probably the answer is a combination of wind, solar, and nuclear, but if we want to invest in wind, it has to be offshore. The power output of a wind turbine is proportional to wind speed cubed and offshore wind is typically much stronger a
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by namirez 7y ago
The article has a link to their paper on arxiv. It's actually easy to follow and very short. https://arxiv.org/abs/1908.03795
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by namirez 7y ago
Topography?
131.
by namirez 7y ago
It happened only once in 1966, but that's for the most part irrelevant. The frequency of high tides is increasing at an alarming rate. Source: https://www.comune.venezia.it/it/content/distribuzione-annua...
132.
by namirez 7y ago
I'm not an expert, but apparently, there are new designs that are inherently safe in the sense that meltdown will never happen even in case of total power failure. But of course, nuclear waste management is a contentious issue.
133.
by namirez 7y ago
This has nothing to do with C vs. C++. It's a fundamental limitation of floating point arithmetic. Here is the Taylor series of \exp: \exp(x) = 1 + x + higher order terms. Sometimes you can represent x by a floating number but 1+x will
134.
by namirez 7y ago
> The SR-71 and U-2 flew plenty high and had enough oxygen Actually none those two planes had fully pressurized cockpits. I guess they were pressurized at 26k feet altitude pressure. That's why the pilots were literally wearing sp
135.
by namirez 7y ago
This is not correct. Here are the formulae: Lift = weight = 0.5 * \rho * v^2 * S * C_L Power = drag * speed = 0.5 * \rho * v^3 * S * C_D where \rho is the air density. A good assumption for cruise is (C_L/C_D)_max. If you do the math,
136.
by namirez 7y ago
> the is a pillar of what makes the US unique. Or perhaps you've not lived in other countries. Don't get me wrong; the US is doing fine, but honestly it's no so unique or even the best place for an average immigrant. For
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by namirez 7y ago
> all the female firefighters Good for them! I'm personally agnostic about this, but you sound as if you know them all and you know what they think. It can be tricky to separate ones perception from reality.
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by namirez 7y ago
> Parachutes are hard. I'm surprised to hear this. I've not heard much about parachute failures in Soyuz landings, except Soyus-1 in the 60's. Nasa had a good track record with parachutes too before they started using th
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by namirez 7y ago
Decriminalization /= Legalization Decriminalization means an activity is no longer criminal, but it can still be punishable as a civil infraction, like crossing a red traffic light. When it comes to hard drugs, some people advocate for
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by namirez 7y ago
> what if the assumptions are wrong? Dark matter and dark energy are not assumptions. The assumptions are the general relativity and the FLRW metric which is the solution of Friedmann equations. The assumptions of Friedmann equations a
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by namirez 7y ago
Fair enough, but better CMB data will resolve the issue at some point. It's not that we need a totally new way of measuring the space curvature.
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by namirez 7y ago
You are right but this has already been done using the CMB data and the universe seems flat with a 0.4% uncertainty. I don't think there is any need for artificial probes for it. Source: https://arxiv.org/abs/1502.
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by namirez 7y ago
> If someone's job is spewing cleverly provocative, disruptive, toxic, and intentionally negative messages all day I agree with you but I guess humans are very good at compartmentalizing their brain. Honestly, these jobs are not t
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by namirez 7y ago
Well, it's not about my opinion. The cost of launching 1kg to LEO on Falcon 9 is $2700 which is a far cry from $35. Please note that $2700/kg is still great since older launch systems cost about $5k-$10k/kg. We are still talk
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by namirez 7y ago
> Indeed, the marginal cost per flight could fall to $5m or below, reducing launch costs to the neighborhood of $35/kg, or 1000x less than Shuttle. The keyword here is "marginal". You can achieve the $35/kg if you on
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by namirez 7y ago
Do you know the cost of putting only 1kg at the Sun-Earth L1 point? To give you an idea, the cost of putting a satellite in the geosynchronous orbit is about $30k/kg, and the geosynchronous orbit is only 36,000 km away. But let's
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by namirez 7y ago
What Fermi is saying is that if 3 out of every 100 generals are great, these 3 should be able to win more than 5 consecutive battles in order to beat the statistical noise. In your example, Mayweather's chance of winning 50 fights by s
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by namirez 7y ago
> For Jobs to understand this and bet his career on it ... he deserves the place and high-regard in technological history he has been given I'm sure Jobs was brilliant, but this kind of praise still reminds of this Enrico Fermi&#x2
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by namirez 7y ago
I think the OP might have a point. Most of these pieces barely make it to the front page. Just take a look at the number of comments on the links you shared: the USA Today story has only 1 comment and the WaPo has 46 comments. Compare this
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by namirez 7y ago
But I thought economists have known this for a long time (at least since 2013). Basically, the Elephant Graph [1] summarizes the effects of globalization. Most of the economic gains of the past few decades went to the super-wealthy and the

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