There are different groups of waves in the electromagnetic spectrum - AQA - GCSE Physics - Question 3 - 2021 - Paper 1
Question 3
There are different groups of waves in the electromagnetic spectrum.
Figure 8 shows the position of three groups of the waves.
Figure 8
Which letter shows the po... show full transcript
Worked Solution & Example Answer:There are different groups of waves in the electromagnetic spectrum - AQA - GCSE Physics - Question 3 - 2021 - Paper 1
Step 1
Which letter shows the position of infrared?
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Answer
The letter that shows the position of infrared is B.
Step 2
Complete the sentence.
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Answer
In this investigation the distance between each flask and the infrared heater is the independent variable.
Step 3
Describe how the equipment in Figure 9 could be used to test this hypothesis.
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Answer
To test the hypothesis, the following steps should be followed:
Initial Temperature Recording: Record the initial temperature of the two thermometers in each flask, ensuring that the temperature starts at the same level in both flasks.
Switch on the Heater: Turn on the infrared heater and start a stopwatch simultaneously.
Temperature Measurement: After five minutes, measure the final temperature of the liquids in both flasks.
Calculate and Compare: Calculate the temperature increase in each flask by subtracting the initial temperature from the final temperature and check if the temperature inside the flasks has increased by different amounts.
Step 4
Which one of the results for the black flask is anomalous?
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Answer
The anomalous result for the black flask is 27 °C.
Step 5
What should the student do with the anomalous result?
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Answer
The student should ignore the anomalous result.
Step 6
Calculate the mean temperature increase for the silver flask.
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Answer
To calculate the mean temperature increase for the silver flask, average the increases from all three tests.
Mean temperature increase = ( \frac{10 + 12 + 11}{3} = \frac{33}{3} = 11 ) °C.
Step 7
What conclusion can be made from Table 1?
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Answer
The conclusion is that the black flask absorbed the most infrared during the five minutes.
