INSIDE MACHINES

Sandbox

Why does a metal spoon get hot?

Heat flows from hot to cold, and some materials let it through hundreds of times faster than others. This is the heat equation, running live on a 30 cm rod with real numbers for each material.

About this sandbox

Heat creeping along a 30 cm rod, solved live with the heat equation ∂T/∂t = α ∂²T/∂x² and real values for copper, aluminium, steel and glass.

Things to try

  • Put a flame at one end and ice at the other.
  • Swap copper for glass and speed time up.
  • Heat a spot in the middle and watch it spread.

More in Heat: Heat plate. See every sandbox, or type your own equation in Free mode.