A student investigated the effect of wind speed on the rate of water uptake by a leafy shoot using a potometer.
During the experiment, a fan was switched on after 5 minutes to simulate wind. The table shows the results.
| Time (minutes) | Volume of water taken up (mm3\text{mm}^3mm3) - Fan switched off | Volume of water taken up (mm3\text{mm}^3mm3) - Fan switched on after 5 minutes |
|---|---|---|
| 0 | 0 | 0 |
| 1 | 4 | 4 |
| 2 | 8 | 8 |
| 3 | 12 | 12 |
| 4 | 16 | 16 |
| 5 | 20 | 20 |
| 6 | 24 | 26 |
| 7 | 28 | 35 |
| 8 | 32 | 46 |
| 9 | 36 | 58 |
| 10 | 40 | 70 |
| 11 | 44 | 82 |
| 12 | 48 | 94 |
Calculate the rate of water uptake from 6 minutes to 11 minutes when the fan 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
