Description: This demonstration shows how the properties of fruit change at low temperatures.
- Fruit (apple works good)
- Large Pan w/Styrofoam
- Protective gloves
- (Optional) Hammer
- Demonstrate that hitting the fruit with a hammer (or dropping it) will do almost nothing to the fruit.
- Fill the pan with LN2.
- Drop the piece of fruit into the pan.
- Wait a few minutes for the fruit to cool down.
- Take the fruit out using the tongs.
- Smash the apple by dropping it, smashing it with the hammer, or other means.
Use caution when working with liquid nitrogen, as it is very cold.
- Be sure to use ALL the protective gear when using the LN2; Safety glasses, cryogenic gloves, and aprons should be worn whenever handling LN2
- Avoid any direct skin contact with the LN2, as it is cold enough to cause cryogenic burns and frostbite.
- The tongs and the pan will both be very cold from being in contact with the LN2; be sure to use the gloves when handling the tongs, the pan, and anything you freeze even after it’s out of contact with the LN2.
- When freezing the fruit, be sure to either completely submerge it, or flip it over, to fully freeze the fruit
- This can be done with things other than fruit as well; there are rubber corks that become solid enough to hammer into wood when frozen through the LN2, for example.
- Any means of applying force to the apple will cause it to shatter; a dramatic way to smash it could be to throw it against the wall.