Question

Identify the process shown in the diagram and explain in brief.

Answer 1

Process: Regelation

Explanation:

• Concept: Regelation is the phenomenon where ice melts under applied pressure and immediately refreezes when that pressure is removed.
• How it works in the diagram: The heavy weights pull the thin wire tightly against the ice block. This creates high pressure directly beneath the wire, which lowers the melting point of the ice and causes it to melt into water.
• The Result: The wire sinks downward through this liquid water. As soon as the wire passes, the pressure on the water above it is released, causing it to instantly refreeze. Consequently, the wire can pass completely through the slab, but the ice block remains intact as one solid piece.