Two computer hardware researchers, Liam and Maya, investigate how the workload level of a laptop processor affects its core temperature. They each record the core temperature of their processor at idle (0 minutes). Liam runs his processor for 5 minutes at a low workload (20% CPU usage). Maya runs her processor for 5 minutes at a high workload (90% CPU usage). Both researchers measure the core temperature of their processors each minute during the 5 minutes of operation. Their results are shown in the table:
| Time (min) | Processor A's Temp (°C) | Processor B's Temp (°C) |
|---|---|---|
| 0 (idle) | 36 | 38 |
| 1 | 44 | 56 |
| 2 | 50 | 71 |
| 3 | 54 | 81 |
| 4 | 57 | 86 |
| 5 | 59 | 89 |
What is the dependent variable in this investigation?
Identify two variables that the researchers controlled in this experiment.
Why is it important to record the processors' temperature at idle before they begin running the workload?
Use the results in the table to calculate the percentage difference in temperature increase between Processor A and Processor B. Use the formula:
Percentage difference=increase in Processor B−increase in Processor Aincrease in Processor A×100\text{Percentage difference} = \frac{\text{increase in Processor B} - \text{increase in Processor A}}{\text{increase in Processor A}} \times 100Percentage difference=increase in Processor Aincrease in Processor B−increase in Processor A×100
Give your answer to 1 decimal place.