A student investigated the effect of temperature on the rate of water uptake by a leafy shoot using a potometer.
During the experiment, a heater was switched on after 4 minutes. The table shows the results.
| Time (minutes) | Volume of water taken up (mm3\text{mm}^3mm3) - Heater not switched on | Volume of water taken up (mm3\text{mm}^3mm3) - Heater switched on after 4 minutes |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 3 | 3 |
| 2 | 6 | 6 |
| 3 | 9 | 9 |
| 4 | 12 | 12 |
| 5 | 15 | 18 |
| 6 | 18 | 24 |
| 7 | 21 | 32 |
| 8 | 24 | 41 |
| 9 | 27 | 50 |
| 10 | 30 | 58 |
Calculate the rate of water uptake from 6 minutes to 10 minutes when the heater was switched on.
Use the equation:
rate of water uptake=volume of water taken uptime taken \text{rate of water uptake} = \frac{\text{volume of water taken up}}{\text{time taken}} rate of water uptake=time takenvolume of water taken up
