Sensei

You can try using up-side-down aquarium instead of your incubator, with some kind of thermostat, which will keep steady temperature inside. And fan from old computer for airflow. This way you will be able to see what is happening (and eventually recording) from outside. Yet another possibility is Arduino WiFi Camera https://www.google.com/search?q=arduino+camera+wifi Cost $3-$4. Together with Arduino module $25 or so. https://www.ebay.com/bhp/arduino-camera (but it has worser parameters than GoPro, as it's just VGA resolution, but you could write custom program controlling it) (e.g. program uploading photos to FTP server, and observe it from home on your smartphone any time you want it)

Make timelapse video while making it the next time..

Very nice project. Personally I would use electric engine connected to Arduino with some radio transmitter to send information to rotate it left/right from home using remote pilot and have full of water pailful before going outside. Think about it. At least you will have a reason to play with Arduino. You could reuse old bike parts like bicycle chain and sprocket.

I use comments (in 99.9% of times) only to disable some part of code.. ps. And to-do e.g. // TODO: [...what to fix in the future...] Some IDE even have special feature to automatically search for and make a list of such TODO comments.

I'm wondering what people have instead of brain, wasting time talking about celebrities...

When it's done by management/directors it's called here "operation to the detriment of the company". It can have various forms e.g. signing of unfavorable contract that will cause lost of company money and/or company property (usually it's connected to taking bribe for doing it). I believe so it's prosecuted from private complaint. One of shareholders must be feeling ripped off. So, if you're the only owner of company, it does not apply.

I agree, large shares holder can influence company. I even said it right above the post you quoted. But it's direct conflict of interest if you own shares of weapon manufacturer, and at the same time you're pacifist (even indirectly, through investment and retirement funds).. From point of view of investor, you are interested in as largest revenue as possible from investment and steady income with expectable dividend.. and it won't come without production of guns and/or change of profile of the company. In other words management which wouldn't try to increase their profits would be working against interest of company (which is considered illegal).

Imagine what would happen if the all (or majority) from Forbes 100 the richest list would declare that they don't invest or make any deals with funds which posses shares of weapon manufacturers in their pockets. Funds would have to start selling their shares ASAP to not lose the best clients.

Aren't we in one of many threads "how to solve problems with guns", "how to get rid of mass shootings, suicides, accidental shootings, murders made by gun" etc. etc. .. ? If fund management is making sub-fund, addressed to people who are against guns, it's just marketing trick to attract investors. They will still continue supporting weapon manufacturers by their money. Just in different sub-funds. If majority of US fund managements will give up on supporting weapon manufacturers entirely, they will cause collapse of these companies, or force them to change their profile, to production of something useful for people instead. Fund managements with large stakes of shares can introduce their managers to board of directors, or even replace CEO. Basically, it's their company. Or rather investor's company who gave fund their money. Fund managements reluctantly reveal their investors exact target of investment (or they're not interested too much, just percent they will earn on it). They should be interested whether their money are landing in weapon manufacturers pockets, if they are against weapons...

"The devil is in the details"... What you said shall be read "we will make special sub-fund ("product") for investors, in which we won't invest in weapon manufacturers" (just catchy phrase for advertisement!).. At the same time it means "we are investing people's money in weapon manufacturers in THE ALL OUR OTHER SUB-FUNDS!"... What I meant in previous post, is that the all retirement funds/investment funds should say "we do not invest any money in weapon manufacturers! We did it in the past, we regret it, but we sold them, because our investors/retired people don't want to support them!"..

..and there will be more, if nothing will be done, because weapon manufacturers have to earn money, year by year.. 1) what are the biggest gun making companies? 2) are they listed on stock markets (which one) ? are they private (which one)? are they owned by government (which one)? 3) who are their shareholders? (and in what percentage) 4) if shareholders are e.g. retirement funds, or investment funds, then which one.. ? 5) should not retired-to-be and retired people know in which companies their retirement funds are investing their money.. ? 6) should not they disallow their retirement funds to invest in company in which they don't believe is doing something good for people.. ?

I think the main purpose of buyback program is to take illegal weapons from streets..

Australian's gun buyback program in 1996 took 660,959 firearms out of private hands. https://en.wikipedia.org/wiki/Gun_buyback_program

Regulations to control who can buy gun is not enough to limit mass shootings. There is also needed buyback of weapons available on 2nd hand market. And "do something" with existing weapon making companies. They demand steady (or growing) income year by year for their products. Buyback of their stocks, and then change of their profile, to production of something useful to people? That reminds me strategy used by U.S.Army in Iraq and Afghanistan. American soldiers offered cash for weapons given away by Iraq army after surrendering to everybody who wanted it (to destabilize country, which they actually managed to do anyway).

There is known just a few Argon compounds. https://en.wikipedia.org/wiki/Argon_compounds As it's Noble gas, they're in majority extremely unstable.

It reminded me this: https://www.youtube.com/watch?v=xj4gSMdaaxE The last time I was making woodwork, I made a wine press: Not as pretty as this one.. Very similar project to hot tub of wood, for sauna.

The very long chain of jokes... https://www.youtube.com/watch?v=NxFkEj7KPC0

I see you just mention amount of Hydrogen everywhere, omitting how much you will need Oxygen.. 100 kg Hydrogen = 100 000 grams / 4.3h / 3600s = 6.46 grams of Hydrogen burned/reacted per second. 6.46 grams of Hydrogen requires 51.27 grams of Oxygen, from air, if you don't take it in tank. There is 0.3 grams of Oxygen in Liter of air at sea-level (and less at higher altitude). 51.27 g / 0.3g/L = 170.9 L of air must be sucked in by fuel cells per second. Approximately 10.26 m^3 per minute. Looks quite a lot. Wouldn't it require powerful air compressor.. ?

They are not comparable. In solar panel you invest once, then you can use the next 20-30 years, without significant costs, until it breaks (with tiny decrease of power after many years of usage). Oil you have to buy day by day. One day oil price on stock market is $145.31 per barrel in July 2008, the next couple months it dropped to $30.28 in Dec 2008. Just an example. You can't predict price of oil in couple months/weeks, not to mention period of 20-30 years. It can, and will, go high, when oil wells will be running out of oil, one by one. High demand for limited good results in increased price. I am great fan of solar panels. I would use them everywhere, if I could, and only after exhausting accumulators use regular power supply.

You're mistaken. You're mistaken. Obviously they would exist, without any purpose. Jupiter, and other giant gas planets, accidentally played very important role in Solar System formation. They attracted cosmic dust, comets, to them self. If they would not exist, rock planets would be bombarded by asteroids,planetoids,comets,cosmic dust, much more often, and life could never appear. But don't turn it up-side-down. Jupiter just helped development of life on the Earth, but was not designed to do so on purpose.

You might find this paper interesting https://www.nature.com/articles/s41598-017-04910-3 It's study how presence of Magnesium Perchlorate (which is 0.6% wt, of Mars surface) together with UV rays accelerate the dying of microorganisms.

One of the largest problems with Venus is that it receives ~90% more energy than Earth. Irradiance 2600 W/m^2, instead of Earth's 1370 W/m^2. You can calculate it reversing inverse-square law: [math]E_e=\frac{P_0}{4\pi r^2}[/math] Ee=1370 W/m^2 on Earth at 150 mln km (150 bln m) distance from the Sun. [math]P_0=E_e 4\pi r^2[/math] P0 is total power released by the Sun (energy per second). Then, calculation of irradiance of other planet at distance r' will be possible using: [math]E_e'=\frac{P_0}{4\pi r'^2}[/math]

If we're at subject "musical instruments (nearly) nobody heard about", how about Theremin Yes, the guy is shaking hands in air, without touching it.. Some can call it magic..

Welcome on the board!

GOTO is essential instruction in machine code/assembly.. JMP (JuMP to absolute address) and BRA (Branch Relative Address given as offset). GOSUB is nothing different from JSR (Jump to Sub-Routine absolute address) or BSR (Branch to Sub-Routine relative address given as offset).