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Crush a Can without Force

Experiments | 7-14 yrs | Learning Pod

How to crush a Coke Can without Physical Force

What You Need

  1. Coke Can
  2. Cold Water
  3. Deep Bowl
  4. Gas Stove
  5. Tongs

8 Steps to crush a can without force

  1. Take an empty metal soda can like a small Coke Can; and wash it.
  2. Now fill a deep bowl with almost ice cold water.
  3. Add a couple of drops of water to the soda can; just enough to cover the surface of the bottom of the can.
  4. Hold the can using tongs; and carefully hold it over a lighted gas stove.
  5. Just allow the water inside the can to boil; or make the bubbling sound with water vapor rising up from inside of the can.
  6. Now immediately invert the can and insert it inside the bowl filled with cold water.
  7. Remember you are still holding the can using the tongs.
  8. The can implodes! It was that easy to squash the can.

How did it happen?

Now let us understand the science behind it all.

  1. The can was initially filled with water vapour (water which boils into gas) and air.
  2. When you turned the can inside the cold water, the vapor changed into water again.
  3. This had miniscule amount of pressure compared to the greater pressure of the water outside.
  4. Nature always craves for equilibrium; and thus “implosion” or cracking at the center of the can occurred to balance the internal and external pressure.

For more such science experiments and articles, visit Science for Kids.