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drosophila

@drosophila@lemmy.blahaj.zone
  • Open on lemmy.blahaj.zone
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8 Posts
Joined May 29, 2024
Open post
drosophila @drosophila@lemmy.blahaj.zone
· 7mo ago

Ummm… 10 knots * 200 = 2000 knots. I don’t think so lol.

First of all, kinetic energy scales with the square of an objects velocity.

Second, since we're talking about a continuous stream of fluid instead of a single object, increasing the air speed not only increases the enegy per unit mass of air, but also the number of units of air per second that pass through the turbine. Which means that the amount of energy extracted scales by the cube of the wind speed.

https://kpenergy.in/blog/calculating-power-output-of-wind-turbines

So, more like going from 10 knots to 60.

Calculate Wind Turbine Power Output: Formula & Steps
KP Energy Limited

Calculate Wind Turbine Power Output: Formula & Steps

A complete guide to calculating the power output of wind turbines. Explore formulas, wind speed effects, rotor area, and practical steps for energy estimation.

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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 5mo ago
Replying to

show the less extreme Trump supporters

Doesn't exist

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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 6mo ago
Replying to
UK is US-lite.
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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 5mo ago

If Open Office were as good a suite of office software as Microsoft, it’d be the industry standard. No business wants to pay Microsoft license fees just because, they do it because the tools work better and create a better end product.

The idea that everything that businesses do is as efficient as physically possible and the executives are all mega geniuses that are incapable of making bad decisions (or are even incentivized to make good decisions) is untrue.

COBAL is not the greatest programming language to ever be invented. It, and the various pieces of dogshit software that companies collectively shell out billions for every year, are used because they are entrenched in their respective industries and corporate structures, not because of their brilliant design.

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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 6mo ago
Replying to

Maybe they could be synced using RF over fiber. This has been proposed as candidate technology for 6g wireless networks, to enable cell free massive MIMO.

That would mean that you would need to run optical fiber to each of them, though we've already seen fiber drones spool out kilometers of the stuff as they fly.

EDIT: I just remembered this interesting article about doing radio interferometry over a fiber network using cheap quartz oscillators instead of atomic clocks. My (layman's) understanding is that the quartz oscillators are good enough over a few milliseconds, but will fall out of sync with each other over longer time spans. Meanwhile the fiber optic reference signal (distributed from a central atomic clock) can be kept correct on average by reflecting the reference back down the fiber and doing active correction of the changing path length (caused by thermal fluctuations and vibrations along the fiber) but will be incorrect on a millisecond-to-miliscond basis because of light speed lag and the path length being a moving target. So they use the quartz oscillators over small time scales and use the fiber reference signal to keep them synced over long time scales. Surprisingly the article says they actually get a better sync this way than with using multiple atomic clocks.

So perhaps something like that is possible.

Radio over fiber - Wikipedia
en.wikipedia.org

Radio over fiber - Wikipedia

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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 8mo ago
Replying to
I had a very similar childhood in the US. I sat at a booth and played with coloring books while my mom worked in a restaurant's kitchen, dad's work was seasonal and very irregular. We didn't drink the tapwater in our little town because it didn't smell right and even came out discolored a few times; instead we'd drive to springs where a bunch of other people got their water too.
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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 5mo ago
Replying to

It’s the wrong frequency to cook anything.

The idea that microwave ovens use some specific frequency that's good for cooking is a myth.

Dielectric heating occurs over a very broad range of frequencies. What actually matters is the energy density of the EM field. A microwave oven cooks food because its putting more than 1000 watts into a small confined space, your cellphone doesn't because its transmitter is shooting less than 1 watt into the open air (where the energy density quickly diminishes by the square cube law).

Why are the microwaves in a microwave oven tuned to water?
Science Questions with Surprising Answers

Why are the microwaves in a microwave oven tuned to water?

The microwaves in a microwave oven are not tuned to a resonant frequency of water. In fact, the microwaves generated inside a microwave oven are no...

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Open post
drosophila @drosophila@lemmy.blahaj.zone
· 8mo ago
Replying to

preferential (ranked choice) voting system

A proportional one like STV, ideally

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