Definitely Tap Water.
No,sound is louder and clearer when it travels through air.
drink water
The difference between clear ice made by freezing previously-heated water and cloudy ice made from ordinary cold tap water is the presence of trapped air bubbles in the cloudy ice. The trapped air comes from gases that were dissolved in the cold water, but which come out of solution during freezing. When water is boiled, or raised in temperature, the solubility of gas is reduced and it comes out of solution, so that when that previously heated water is frozen there are no bubbles formed and the ice is clear.
Your urine turns clearer.
There are a couple reasons. Just like making tea, you start with cold water because it is clearer. Hot water comes out of the tap foggy. The more important reason is that cold water doesn't immediately cook the proteins.(like blood in the marrow of the bones) It allows them to float to the top where you can then easily skim them off.
Tropical waters are nutrient poor at the surface. When living things die at the surface they sink to the bottom where they decompose. The nutrients that are released when they decompose stay at the bottom because there's a thermocline--the deep water is cold and the surface water is warm and they don't mix. So the surface waters don't have much algae and stay clearer.
as far as I'm aware yes
Less clear water has more algae and other nutrients. It is much more suitable for sustaining life. Clearer water has less nutrients, etc. and is less suitable for sustaining life.
Hot distilled water would make for a clearer ice cube. It has less entrained gases.
make your question more clearer and i think it is vinegar
cold water w/ high salinity