>How expensive is wire these days?

Way more expensive in recent years due to short supplies of copper, but the cost of the wire is outstripped (yeah, I did that) by the cost of the trenching too.

Definitely efflorescence. I've had this happen from water seeping up from below the concrete in a basement, and I currently have this in a garage where the water comes in on the car and when it gets to the concrete leaches out some of the minerals (not sure, some form of calcium or calcite?) and crystalizes as the water evaporates.

The only case that needs remediation is when the moisture is coming through the concrete (so, not the garage example above) and has enough actual water moving to pool on the surface. Other than that just sweep or vacuum away. Don't breathe the dust if it gets airborne.

Sharon MA is a good choice in that vibe and price range also having a great school system. A quick check of zillow shows several homes currently on the market.

You can get Timberlok screws at the home center.

https://www.homedepot.com/b/Hardware-Fasteners-Screws/TimberLOK/N-5yc1vZc2b0Zcbp

Not disagreeing with the goal, just suggesting that there are alternate means that could be used that would not potentially cause harm to innocent people.

No, I was suggesting that instead of repealing it we ADD a new section that provides for an effective mechanism for public employees to force the handling of issues that would otherwise require a strike by other (effective - important) means.

Work stoppage by public employees like police, fire, ambulance and all other essential services could have catastrophic consequences. This approach assures both the services are not interrupted AND the issues are expeditiously handled.

The problem is not that they are not allowed strikes, which is necessary because many public employees are essential and failure to work could literally kill people...

What they do NOT have is an effective alternative that forces the gov't to act on legitimate grievances. That should be added to the law.

Steam is water in a gaseous form and invisible.

Water vapor is made up of water droplets that are so light they are carried by the air currents.

Sounds like aerogel and a frozen slush of salt water would work, but you're correct about expense! At this point the problem has left the theoretical and has entered the nuts and bolts real-world engineering phase of "what exactly can we live with" vs "what can we afford". These will mandate the tradeoffs and compromises that will result in your final assembly. Not knowing anything about your business I can't help you there ;0), but I can wish you luck!

The problem in that application is you are working against the second law of thermodynamics. For that application what you really need is anything (being gel doesn't matter) that is cold with a high specific heat capacity and seriously good insulation.

TL;DR; work on air-tight high quality insulation for the container before worrying about the gel. When you get to that use the second wikipedia source below for high specific heat capacity materials as a starting point to create your gel. Spoiler: ice or salty water might be the best bet for low temp applications like this one.

If you have a container full of just your product at 5C and you put it in the sun the solar radiation will heat that container with about 1000Watts/square meter. With zero insulation it's going to heat up pretty fast. Sade the box and you reduced the Watts/square meter that you need to deal with. Insulate the box and you change the speed that heat energy can move from the box surface to the box interior. Now you can't use these techniques to completely solve the heating problem, provide a reservoir of cold mass that can soak up a lot of energy without changing temperature. This is where the heat capacity of your gel (or whatever, it could be a container of ice) comes into play.

Water is a great example of this since water has a very high heat capacity. To illustrate it put plain water ice in a pan and turn on the heat. The ice will soak up a lot of energy turning to liquid before allowing the temperature of the water in the pan from rising above 0C. (this is in an ideal case of course blah blah assumptions, massless pistons and frictionless surfaces, etc)

Read more about specific heat capacity:

https://en.wikipedia.org/wiki/Specific_heat_capacity

Materials:

https://en.wikipedia.org/wiki/Table_of_specific_heat_capacities

I'm not sure what you're really asking for here... Does it have to stay in the 5-8C range for 90 hours or is it maintaining something else in that range for that timeframe? Perhaps some more information would help?

What is the purpose you are trying to achieve? Refrigeration? A preserved reservoir of cold that could be used (possibly for refrigeration or just thermal difference) at a later date? What is the temperature range that will work for your application?

Even if you used all of the available fusion fuel (deuterium/tritium and any other hypothetical possibilities) you would not get close to the power coming from the Sun. The Sun contains 99.8 % of the mass of the solar system, and most of that (73%) is hydrogen. As our energy needs rise we will inevitably need to capture more of the Sun's output to meet those needs.

>Many Islamic people are under attack for being Islamic.

You're right, there are moronic people out there afraid of any differences.

I completely sympathize with that, and that should be corrected... but I'm pretty sure this action will neither help that problem nor be interpreted as a solution to it.

edit: clarity++

Why does this even rise the the level of Boston City Business?

I believe that limitation is for visible spectrum telescopes. IR telescopes can see through the dust because IR is not impacted as much.

One source: https://www.esa.int/Science_Exploration/Space_Science/Herschel/More_about_the_infrared