Q1. The speed of sound is directly related to its wavelength and frequency. The speed of sound (v) is equal to the wavelength (λ) times the frequency (f), or v = λf. This means that if the frequency of a sound increases, its wavelength decreases, and vice versa, assuming the speed of sound remains constant.

Q2. A sound wave is called a longitudinal wave because its particles vibrate parallel to the direction of the wave's propagation. This means the particles move back and forth in the same direction that the wave is moving, creating areas of compression and rarefaction.

Q3. If the frequency of a source of sound is 100 Hz, it vibrates 100 times per second. Since there are 60 seconds in a minute, it would vibrate 100 Hz * 60 = 6000 times in a minute.

Q4. An echo is a reflection of sound that arrives at the listener some time after the direct sound. It is caused when sound waves bounce off a surface and return to the listener.

Q5. Waves transport energy, not matter. The particles of the medium through which the wave travels may experience some displacement, but they return to their original position after the wave has passed.

Q6. A wave is a disturbance that transfers energy from one place to another without transferring matter. It involves the movement of energy through a medium (like air, water, or any other liquid or solid matter).

Q7. The characteristics of sound that help us identify a person in a dark room include the pitch, timbre, and volume of their voice. These characteristics are unique to each individual and allow us to recognize them even without visual cues.

Q8. If the amplitude of a wave is doubled, the loudness of the sound will increase. This is because the amplitude of a wave is directly related to its energy, and the energy of a sound wave is perceived as loudness. However, the relationship is not linear, and a doubling of amplitude does not mean a doubling of perceived loudness.

Question

Q1. The speed of sound is directly related to its wavelength and frequency. The speed of sound (v) is equal to the wavelength (λ) times the frequency (f), or v = λf. This means that if the frequency of a sound increases, its wavelength decreases, and vice versa, assuming the speed of sound remains constant.

Q2. A sound wave is called a longitudinal wave because its particles vibrate parallel to the direction of the wave's propagation. This means the particles move back and forth in the same direction that the wave is moving, creating areas of compression and rarefaction.

Q3. If the frequency of a source of sound is 100 Hz, it vibrates 100 times per second. Since there are 60 seconds in a minute, it would vibrate 100 Hz * 60 = 6000 times in a minute.

Q4. An echo is a reflection of sound that arrives at the listener some time after the direct sound. It is caused when sound waves bounce off a surface and return to the listener.

Q5. Waves transport energy, not matter. The particles of the medium through which the wave travels may experience some displacement, but they return to their original position after the wave has passed.

Q6. A wave is a disturbance that transfers energy from one place to another without transferring matter. It involves the movement of energy through a medium (like air, water, or any other liquid or solid matter).

Q7. The characteristics of sound that help us identify a person in a dark room include the pitch, timbre, and volume of their voice. These characteristics are unique to each individual and allow us to recognize them even without visual cues.

Q8. If the amplitude of a wave is doubled, the loudness of the sound will increase. This is because the amplitude of a wave is directly related to its energy, and the energy of a sound wave is perceived as loudness. However, the relationship is not linear, and a doubling of amplitude does not mean a doubling of perceived loudness.

Knowee AI · Accepted Answer