🎓 Doc Freemo 🇳🇱 @freemo@qoto.org

@skyblond

https://youtu.be/qbuNroHBtOM?si=hs3sSIfpNHG6qCPI

@skyblond Yup you sure can. In fact I've seen people use LED matrices as a poor mans touch screen. You light up the leds and basically measure the current draw. When you block it with your finger it reflects some of the light and changes the current draw slightly. So you can use this to detect where the finger is.

So in this way you can use it as both a light-emitting device AND a light-detecting device at the same time.

@admin I find it extremely useful. Not sure why it would be any useful on a one user instance. But yea it can be a bit resource hungry for sure.

Interesting fact of the day. While solar panels do generate some energy from visible light the overwhelming majority is in fact int he infrared part of the spectrum. In fact its peak is well within the infrared but has a black-body like curve.

Since solar panels are essentially just LEDs designed to have maximum surface area this works in both directions. If you apply a voltage to solar panels they will visibly glow in infrared light.

@realcaseyrollins

When the two parties involved remain static that would be true in many cases. 10x the deaths for a day is less than 10 years of 1/10ths the deaths. Sure thats fair.

But thats not the case here. We are talking about a relatively small war over a long period of time vs a world war involving the entire world, which based on past world wars is likely to last years.

To put this to actual numbers. WWII resulted in, on average, 10,000 deaths per day over a 7 year period. Resulting in 53 million deaths total.

By contrast in the ukranian-russian war, in its current phase has been going on for exactly 2 year as of 2 days ago. In the course of those two years there has been a total estimated death toll of half a million. That is 684 people per day.

So a large world war results in ~20x more people killed per day then a much smaller, but potentially longer lasting war. Considering a global war tends to not be short, as ~7 years given past incidents that would mean the russion-ukrain war would have to last 140 years in order to cause more casualties than the world war that would result if the USA got directly involved.

@randahl @trendytoots

@khird Ahh your talking about forward tipping, I was thinking of rolling... Ok yea that makes more sense, elongation allows for less equal distribution on that axis.

interesting fact of the day: Thermal conductivity of all known materials spans ~ 5 orders of magnitude with a perfect vacuum being the least conductive and diamond being the most. (and diamond is insanely impressive at it compared to even most metals).

By comparison electrical conductivity spans 30 orders of magnitude, not counting super conductivity, between a vacuum and silver.

The reason superconductivity probably shouldn't be considered is because while it is truly a perfect conductor it does have a maximum capacity at which point it will break down and show normal conductivity properties again. So it doesn't actually behave like normal conductivity.

#STEM #Physics

@khird While i do agree that the shape can effect orientation in the water, I would disagree that is due to barrel shape. A true barrel shape is symmetric and thus would not allow for better stability.

Barrel shapes are known to be optimally aerodynamic shapes (see planes, and blimps) and thus would be more suited to making swimming more efficient in that sense I would imagine. That is also the reason, I suspect, a hippo is barrel shaped, for aerodynamics in the water.

@realcaseyrollins

Its a war with Russia. To win the war would take the full engagement of the entire USA military in a full our war with Russia. I personally wouldn't mind that engagement but its a order of magnitude difference in commitment.

Since we are obviously not willing to devote the entire USA military to the defense of Ukraine, clearly helping Ukraine extend a war out indefinitely is far superior than letting Ukraine be wiped off a map.

@randahl @trendytoots

@TheOldGuy

Them: ::smoking a cigarette at a bar::

Me: I thought you quit smoking?

Them: Yea, I did, I only smoke when I drink now.

Me: But you are always drinking.

Them: Yea, I'll work on that problem next.

@realcaseyrollins

That is a very odd take. Not that I disagree that it is a proxy war, it is, but the take that that is somehow immoral seems wrong.

Two people had a war, we decided to offer non-human-life support to the under dog. Why is that wrong. Assuming we think Ukranians deserve to be supported then why would providing them with money and weapons be morally worse than letting them die with no support?

@randahl @trendytoots

@bluGill

While that is true for a few special circumstances the effect here would 1) be extremely small and 2) would be made worse by having a large central body anyway. A decentralized shape (one with very high surface area) would see effects towards this end, the opposite of what is stated.

@mike805 Yea I can totally see their shape helping them be better swimmers by being more aerodynamic. Thats not the same as "floating" though.

Why would the shape help you float? Shape has no effect on buoyancy, only density.

@chadpybara Why would the shape help you float? Shape has no effect on buoyancy, only density.

@LouisIngenthron hahah indeed :) Language is weird.