Energy (*Q*) and power (*P*) are related by *Q* = *Pt*.
This means the longer (*t*) you turn on a heater, the more heat (*Q*) it will produce.
And the higher the power (*P*) is, the more heat (*Q*) it will produce.

Two identical, closed boxes each have a round heater at the center, with the power output as labeled.
Instructions: 1) Run the model and turn the graph on to monitor the temperatures;
2) Use the buttons at the upper-right corner of the graph window to rescale the curves if necessary;
3) Calculate **the ratio of the temperatures** measured by the two thermometers in the two boxes
and compare it with **the ratio of the heating powers**.

0 W/m^{3} |
1000 W/m^{3} |

0 W/m^{3} |
1000 W/m^{3} |