Infrared waves are transverse waves - AQA - GCSE Physics - Question 1 - 2023 - Paper 2
Question 1
Infrared waves are transverse waves.
Complete the sentence.
In a transverse wave, the direction of oscillation is **perpendicular** to the direction of energy tran... show full transcript
Worked Solution & Example Answer:Infrared waves are transverse waves - AQA - GCSE Physics - Question 1 - 2023 - Paper 2
Step 1
Complete the sentence.
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Answer
In a transverse wave, the direction of oscillation is perpendicular to the direction of energy transfer by the wave.
Step 2
Describe a method to test this hypothesis.
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Answer
Heat water in a kettle and add an equal volume of hot water to each flask.
Insert a thermometer into each flask to record the initial temperature.
Place an IR detector near each flask, ensuring the same distance each time.
Record the initial readings from the IR detectors.
Start a stopwatch and allow the flasks to cool for 10 minutes.
After 10 minutes, record the final temperatures in each flask.
Calculate the temperature change for each flask and compare the results to investigate if the black flask emitted more infrared radiation than the silver flask.
Step 3
When will the flasks emit infrared radiation at the greatest rate?
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Answer
During the 1st minute. This is because the temperature difference between the hot water and the surroundings is greatest at the beginning, leading to a higher rate of infrared emission.
Step 4
Which equation correctly links area, force and pressure?
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Answer
The correct equation is: pressure = force / area.
Step 5
Calculate the force of the water on the bottom of the cube.
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Answer
To calculate the force, use the formula:
F=PimesA
Given that water pressure (P) is 1500 Pa and the area (A) of the base is 0.0144 m²:
F=1500imes0.0144=21.6extN
Thus, the force of the water on the bottom of the cube is 21.6 N.
