Just as the title says.
In: 4
Aluminum cans are shaped in a way to have a ton of tensile strength (like pulling a rope) under pressure. When that pressure is gone, it can be easily crushed (compression)
Water can “hold” molecules. Like sugar and salt. It even “holds” tea and coffee, at least the parts small enough for water to hold.
Water is VERY polarized. One side is negative and one side is positive. Usually this holds the water together and gives it that “water” feeling. However, it is SO polarized that this attracts other particles by accident. Anything that can be reduced to a simple molecule can be dissolved. So caffeine can be dissolved but a whole coffee bean or tea leaf cannot.
Air is especially known for being small particles! Air gets trapped in water all the time. Constantly. Any sip of water you’ve ever had, most likely had air in it.
To simplify things, let’s say that water needs a charge of 10 per unit of volume to be water. (I’m making this up to simplify things) and each water atom can produce a charge of 1. At room temp, you can get 50 water molecules in one unit of volume! You have way more charge than you need to be water, so when something wanders in and wants some charge the water is happy to give it.
In this example, at room temp, you can have 20 extra molecules dissolved per unit of water. 20 extra + 20 water + the ten you need to be water = 50. (This is completely made up math)
Now what happens when things get hotter and colder? Their density changes, or the number of molecules per unit!
So hot water has fewer water molecules per unit this keeps decreasing until you get below ten and POOF you have water vapor!
Meanwhile! Cold water gets MORE! In fact, until water freezes, it gets denser and denser. It will only freeze when you have (made up numbers) 100 water molecules per unit!
This is where it gets fun.
So as water gets colder, it can hold more water per unit. This means that the maximum amount of dissolved molecules can increase too!
Total 60? 25-35,
80? 35-45
100?! 45-55.
Now wait, shouldn’t the water freeze now? NOPE! just because it’s cold enough to freeze, doesn’t mean it can! You need 100 water molecules in one unit to freeze. Water with dissolved molecules freezes at a lower temperature! Which let’s it hold even more dissolved particles!
Disclaimer: hot water with dissolved things boils at a hotter temp than regular water too but that doesn’t fit my example and I also don’t remember why!
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