Energy storage costs money. A surplus for the noon hours every day doesn’t help anything.

Well anyone can 3D print something, but it’s the modeling of a printable object that is your skill. However modeling and designing are two different things.

If I had your equipment and skills right now I would start printing bathtub jet plugs. Convert a jetted tub into a non-jetted. Probably only a few different brands and designs to cover.

Aside from that, I’d get into mold making. You can 3d print a mold, or even a mold of a mold. Or a mold of a mold of a mold. Then you can cast objects in metal or ceramic, or silicone or even plastic (haha) or other materials that can be a liquid. Way more interesting than plastic shapes. Plus molds can be used many times.

As far as the business goes? No idea. Start by making useful objects that people want to buy. But that’s kind of a different skill of “inventor”.

I was just thinking about this. Love these videos. Cooling of a solar panel is a good application, as long as it gets cold enough for long enough to re-solidify at night.

An alcohol/NaCl solution with a stabilizer can make an ice pack that freezes colder than water. That could be used to keep ice cream frozen in an ice chest.

It would be cool to have recipes for a few different temperatures. There’s a German company Qool Products that sells PCM temperature elements (ice packs), at a variety of temperatures, to store ice cream up to red wine/cellar temp in their ice chest. With some trial and error I guess we could now make our own!

Thanks it looks like the Edgerouter X would meet my needs. I’m not sure I would need a switch though since it has 4 ports.

I’d really like if there was a high end router and switch without WiFi. I already have all my wireless handled by 3 access points. Is there a high end router/switch with 4 ports?

Well if protection from solar heat is the goal, it will be hard to beat the “chrome dome” or reflective parasol. Sometimes the ground reflects quite a bit of heat from below, like snow. Then I guess a shirt might out-perform a parasol.

Google also says to put glue on your pizza.

It seems it’s still an active debate and area of research, but the answer is more complex than wavelengths and emissivity. If you want to know whether black or white is cooler in the sun, it depends on: the breathability or knit, the amount of UV hitting the skin, the amount of skin contact with the fabric, wind speed, relative humidity, how the fabric wets and wicks moisture, and more. We could look at a black trash bag and say, well it’s transparent to IR, and it blocks the visible spectrum, therefore it’s a good shirt material to keep one cool. And obviously that would be wrong. In the same way it’s wrong to say: a white shirt feels less hot when you touch it, therefore it keeps the wearer cooler.

Maybe they should make it super bureaucratic and you have to pay to renew your civil union every 7 years, otherwise it dissolves.

Body emits infrared radiation. Sun does too. They make foil-lined jackets to reflect this heat. White shirts do it too, as shown in the image.

The solution is simple, as it is for gay marriage. Marriage is not recognized by the state/government.

There are plenty of protected lanes in my city, but they just hide bicycles behind parked cars, making it less safe at every intersection.

The only way I can think that might work better would be to convert a 3-lane road (with suicide/turn lane in center), into a 2-lane road. The center lane gets converted into a two-way bicycle road - raised up like a sidewalk with curved curb. No left turns allowed for cars, only right turns. This way bicycles are visible and protected.

Body puts off heat too. White reflects it back, black lets it escape.

Need to use Heat Index or Wet Bulb temperature. Dry heat is not the same as humid heat - the latter contains way more heat energy. In arid regions air conditioning, or water, will prevent most heat-related risk into the future. It’s the humid regions that will suffer in heat waves.

You mean xAI?

The best time to plant a tree is 30 years ago. The next best time is now.

I am joking

Yeah it’s typically not used for dosages, rather it’s for concentrations in solution. However strictly speaking the grams cancel in the units of ng/kg and you are left with ppt. I think of ppm and ppt as very small percentages anyway. As per cent means part per one hundred. Can’t use “permille” because it means part per thousand but sounds like part per million.

In the case of a lethal dose, I think it would be fine to say, “it’s lethal at a rate of 2 trillionths of body mass”.

I would probably do a one-time purchase but I don’t do subscriptions.

It’s possible to make a rasterized pdf - that would just be an image with specs for printing. I think teachers need to specify their expectations. Submit a plain text file? Submit a markdown document? Submit a Word doc? Is hand-written okay? What about a type-writer?

A pdf is just a digital version of paper, and since paper is obsolete, the pdf is probably a bit archaic for somebody who has no intention of printing it.