A student investigated how wind speed affects heat loss from the body using two beakers of hot water to model thermoregulation. Beaker A had a electric fan blowing air across it to simulate wind, while Beaker B cooling took place in still air.
Their results are shown in the table below.
| Time (minutes) | Beaker A (with fan) temperature in °C | Beaker B (still air) temperature in °C |
|---|---|---|
| 0 | 95 | 95 |
| 2 | 84 | 90 |
| 4 | 70 | 83 |
| 6 | 58 | 76 |
| 8 | 46 | 70 |
| 10 | 36 | 64 |
| 12 | 28 | 58 |
| 14 | 22 | 52 |
Calculate the rate of temperature change in Beaker A from 2 to 10 minutes. Show your working.
