Marvin & Milo

Unsliced ice

 
Unsliced ice

 

What you need:

An ice cube

Polystyrene

About 20cm of thin wire

Two equal weights eg full drinks bottles

A sturdy piece of wood and a brick

 

Instructions

In a cold room, weight the wood down on a table with the brick. Let the end jut over the edge and put a slab of polystyrene on it.

Fix the weights to each end of the wire – use strong tape if necessary.

Hang the wire over the middle of the ice cube. Wait for some time. The wire should cut its way through the ice but leave the ice cube in one piece.

 

Results & explanation

Because ice is less dense than water, pressure from the wire squeezes and helps to melt it. (Scientists are still trying to understand all the reasons why it melts!) As the wire moves down, the water refreezes above it.

 

See previous cartoons

  
Free fluid

Heavy atmosphere

Dogged drifter

Remote detector

Free fall ride

Electric slime

Pressure fountain

See more on physics.org