1. What is interference of waves? A. A superposition of two waves to form a wave of larger or smaller amplitude. B. A superposition of two waves to form a resultant wave with higher or lower velocity. C. A superposition of two waves to form a resultant wave with higher or lower frequency. D. A superposition of two waves to form a resultant wave with longer or shorter wavelength. 2. What is superposition principle? A. A principle about human responses to stimuli. B. A principle that describes how superheroes move. C. A principle that describes what will happen when you put two waves on top of each other. D. A principle that tells you what happens when you put any two objects on top of each other. 3. Which of the following describes destructive interference? A. Combining two peaks B. Combining two troughs C. Combining two rest positions D. Combining a peak and a trough 4. If a peak of one wave, and the peak of another wave overlap, what will the resultant wave look like? A. A flat line C. A larger peak B. A small peak D. A larger trough 5. Pure constructive interference occurs between two waves when they have the same _______. A. amplitude and are in phase C.frequency and are in phase B. amplitude and are out of phase D. frequency and are out of phase 6. Which of the following is the speed of a wave traveling with a wavelength λ, frequency f, and period T? A.v = B. T = C. v = λ·f D. v = f·T 7. Which of the following statements is TRUE about Doppler Effect? A. It occurs when a wave source moves towards an observer. B. It occurs when an observer moves towards a wave source. C. It occurs when a wave source moves away from an observer. D. It occurs when an observer moves away from a wave source. 8. Why does the amplitude of a sound wave decrease with distance from its source? A. The amplitude of a sound wave decreases with distance from its source, because the speed of the sound wave decreases. B. The amplitude of a sound wave decreases with distance from its source, because the frequency of the sound wave decreases. C. The amplitude of a sound wave decreases with distance from its source, because the wavelength of the sound wave increases. D. The amplitude of a sound wave decreases with distance from its source, because the energy of the wave is spread over a larger and larger area.
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Just choose the letter of the correct answer, no need to explain. this is not a writing assignment
1. What is interference of waves?
A. A superposition of two waves to form a wave of larger or smaller amplitude.
B. A superposition of two waves to form a resultant wave with higher or lower velocity.
C. A superposition of two waves to form a resultant wave with higher or lower frequency.
D. A superposition of two waves to form a resultant wave with longer or shorter wavelength.
2. What is superposition principle?
A. A principle about human responses to stimuli.
B. A principle that describes how superheroes move.
C. A principle that describes what will happen when you put two waves on top of each other.
D. A principle that tells you what happens when you put any two objects on top of each other.
3. Which of the following describes destructive interference?
A. Combining two peaks
B. Combining two troughs
C. Combining two rest positions
D. Combining a peak and a trough
4. If a peak of one wave, and the peak of another wave overlap, what will the resultant wave look like?
A. A flat line C. A larger peak
B. A small peak D. A larger trough
5. Pure constructive interference occurs between two waves when they have the same _______.
A. amplitude and are in phase C.frequency and are in phase
B. amplitude and are out of phase D. frequency and are out of phase
6. Which of the following is the speed of a wave traveling with a wavelength λ, frequency f, and period T?
A.v = B. T = C. v = λ·f D. v = f·T
7. Which of the following statements is TRUE about Doppler Effect?
A. It occurs when a wave source moves towards an observer.
B. It occurs when an observer moves towards a wave source.
C. It occurs when a wave source moves away from an observer.
D. It occurs when an observer moves away from a wave source.
8. Why does the amplitude of a sound wave decrease with distance from its source?
A. The amplitude of a sound wave decreases with distance from its source,
because the speed of the sound wave decreases.
B. The amplitude of a sound wave decreases with distance from its source,
because the frequency of the sound wave decreases.
C. The amplitude of a sound wave decreases with distance from its source,
because the wavelength of the sound wave increases.
D. The amplitude of a sound wave decreases with distance from its source,
because the energy of the wave is spread over a larger and larger area.
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