What Happens When You Insert a Coin Into Dry Ice? [WATCH VIDEO]
Ever wonder what happens when you insert a coin into a block of dry ice? Well, something interesting happens. Watch the video and get your nerd on.
Any metal coin produces a shrill screeching sound, vibrates and looks like it is shivering when in contact with dry ice. How did this happen? Here’s how — the heat from the metal coin creates air currents which cause the vibration. Dry ice is carbon dioxide (CO2) in frozen form. CO2 is a compound heavier than air. As the coin comes in contact, it increases the sublimation (changing from solid to gas) of CO2, which forms the air currents. These currents push the coin back and forth to create the vibrations and screeching sound. The sound produced by the coin on dry ice is called Bernoulli principle effect. Check out an elaborate explanation of the Bernoulli principle here.
You can try out this cool experiment and see what happens to the coin first hand. This is an easy one, but you have to be careful when handling dry ice. It is very cold, so you need gloves (a thick one) in handling it.
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Photo source: Wikimedia Commons/Hajotthu