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Question 1:

What property of sound determines its frequency?

A) Amplitude
B) Wavelength
C) Pitch
D) Intensity

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Explanation: The correct answer is B) Wavelength. The property of sound that determines its frequency is the wavelength. Frequency is defined as the number of complete cycles (vibrations) of a sound wave that occur in one second. It is measured in Hertz (Hz). The wavelength is the distance between two consecutive points in a sound wave that are in phase.

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Question 2:

Which property of sound determines its loudness or volume?

A) Frequency
B) Amplitude
C) Pitch
D) Wavelength

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Explanation: The correct answer is B) Amplitude. The property of sound that determines its loudness or volume is the amplitude. Amplitude refers to the maximum displacement of particles in the medium from their equilibrium position as the sound wave passes through. Greater amplitudes correspond to louder sounds, while smaller amplitudes correspond to softer sounds.

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Question 3:

How is the pitch of a sound related to its frequency?

A) Higher frequency corresponds to higher pitch
B) Lower frequency corresponds to higher pitch
C) Frequency and pitch are unrelated
D) Pitch is determined by the wavelength, not frequency

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Explanation: The correct answer is A) Higher frequency corresponds to higher pitch. Pitch is the subjective perception of the frequency of a sound. Higher frequencies are perceived as higher pitches, while lower frequencies are perceived as lower pitches. For example, a sound wave with a higher frequency (more vibrations per second) will be perceived as a higher-pitched sound, such as a whistle, whereas a sound wave with a lower frequency will be perceived as a lower-pitched sound, such as a deep bass note.

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Question 4:

Which unit is used to measure the frequency of sound?

A) Decibel (dB)
B) Hertz (Hz)
C) Pascal (Pa)
D) Joule (J)

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Explanation: The correct answer is B) Hertz (Hz). The frequency of sound is measured in Hertz (Hz), which represents the number of cycles or vibrations per second. It is named after Heinrich Hertz, a German physicist who made significant contributions to the study of electromagnetism and the measurement of frequencies.

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Question 5:

How does the amplitude of a sound wave affect its perceived loudness?

A) Higher amplitude corresponds to higher loudness
B) Lower amplitude corresponds to higher loudness
C) Amplitude and loudness are unrelated
D) Loudness is determined by the wavelength, not amplitude

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Explanation: The correct answer is A) Higher amplitude corresponds to higher loudness. The amplitude of a sound wave directly affects its perceived loudness. Greater amplitudes result in higher displacements of particles in the medium, leading to higher energy being transferred and a greater sensation of loudness. Conversely, smaller amplitudes result in lower loudness, as the displacements and energy transfer are reduced.