There's a tiny metal ball inside. Over time, the correction fluid will start to dry and thicken inside the container, the chemical components seperating out from the water inside. The ball helps mix things up again when you shake it.
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A typical correction fluid bottle, such as Tipp-Ex, contains a mixture of pigments, solvents, and other chemicals to form a thick liquid that can cover mistakes. The noise you may hear when shaking it comes from the pigments and other solid particles inside the bottle moving around and colliding with each other.
Blowing into a bottle that is three-quarters full will likely make more noise compared to blowing into a bottle that is completely full. This is because the air inside the partially filled bottle has more space to vibrate and create sound waves when disturbed.
The noise you hear when drinking from your Hydro Flask is likely caused by the air pressure inside the bottle equalizing with the outside air as you drink. This can create a popping or gurgling sound.
No, clouds do not make noise.
Sodastream machines use pressurized carbon dioxide to carbonate water, which can create a loud noise as the gas is released into the bottle. The noise is typically a result of the build-up of pressure being released quickly during the carbonation process.
No, light does not make noise when it travels through a vacuum.