If I partially fill a bottle with water (even cold water), add some soap, close it up and shake it; when I open I open it back up, it tends to spurt / hiss / generally act like it was under pressure all of a sudden, even though the total volume of liquid inside is still the same.
Why?
Please and thank you xxx
In: 12
Usually this comes down to water temperature.
If the water is warmer than the air, then shaking it up heats the air causing it to expand. Has nothing to do with the soap, we just usually only put hit water in a bottle, then cap and shake it when we’re also adding soap to clean it.
Add soap to cold or room temp water, let it rest a bit so the temperature really equalizes, then cap and shake. It won’t pop the same.
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