Table 3 gives the frequencies in the hearing ranges of five different animals - AQA - GCSE Physics - Question 9 - 2019 - Paper 1
Question 9
Table 3 gives the frequencies in the hearing ranges of five different animals.
Table 3
| Animal | Frequencies of hearing range |
|----------|--------------------... show full transcript
Worked Solution & Example Answer:Table 3 gives the frequencies in the hearing ranges of five different animals - AQA - GCSE Physics - Question 9 - 2019 - Paper 1
Step 1
Which one of the animals from Table 3 would not be able to hear ultrasound?
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Answer
The animal that would not be able to hear ultrasound is Chicken. This is because chickens have a hearing range of only 125 Hz to 2 kHz, which does not include ultrasound frequencies.
Step 2
Which of the following is the same as 2 microseconds?
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Answer
The value that is the same as 2 microseconds is 2 x 10⁶ s. Microseconds are one-millionth of a second, so 2 microseconds equals 2 x 10⁻⁶ seconds.
Step 3
Determine the depth of the crack below the top surface of the aluminium.
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Answer
To find the depth of the crack, we need to use the formula:
When rounded to two significant figures, the depth of the crack is 0.025 m.
Step 4
What is the function of a microphone?
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Answer
The function of a microphone is to convert sound (pressure variations in sound waves) into electrical signals. It detects sound waves and transforms the mechanical energy of the sound into an electrical current.
Step 5
Explain how a moving-coil microphone works.
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Answer
A moving-coil microphone works by having a diaphragm that vibrates in response to sound waves. As the diaphragm moves, it causes a coil of wire attached to it to move within a magnetic field. This motion induces an electrical current in the coil, which corresponds to the sound wave. The electrical signal generated can then be further processed or amplified to produce sound output.
