Mechanical Oscillation & Sound Waves

What is the definition of mechanical oscillation?

• Static position of an object

• Random movement of an object

• Continuous circular motion of an object

• Repetitive back and forth movement of an object around a central position.

Explain the difference between free and forced oscillations.

• Free oscillations are self-induced, while forced oscillations are externally induced.

• Free oscillations are externally induced, while forced oscillations are self-induced.

• Free oscillations have a constant amplitude, while forced oscillations vary in amplitude.

• Free oscillations occur in a vacuum, while forced oscillations occur in a medium.

How does damping affect the amplitude of an oscillating system?

• Damping decreases the amplitude of an oscillating system.

• Damping stabilizes the amplitude of an oscillating system.

• Damping increases the amplitude of an oscillating system.

• Damping has no effect on the amplitude of an oscillating system.

What is the relationship between frequency and period in an oscillating system?

• Mathematically, frequency = period or period = frequency.

• Frequency is the time taken for one complete oscillation, while period is the number of oscillations per unit time.

• Frequency and period are directly related in an oscillating system.

• Frequency and period are inversely related in an oscillating system. The frequency is the number of oscillations per unit time, while the period is the time taken for one complete oscillation. Mathematically, frequency = 1 / period or period = 1 / frequency.

Define resonance in the context of mechanical oscillation.

• Resonance is only observed in electrical circuits.

• Resonance is when an external force matches the natural frequency of a system, causing increased amplitude of oscillations.

• Resonance leads to a decrease in amplitude of oscillations.

• Resonance occurs when a system has no oscillations.

What are the characteristics of a longitudinal sound wave?

• Longitudinal waves do not have compressions and rarefactions

• Particles oscillate randomly

• Particles oscillate in the same direction as the wave propagation, with compressions and rarefactions.

• Particles oscillate perpendicular to the wave propagation

Explain the concept of wavelength in relation to sound waves.

• The wavelength in sound waves is the amplitude of the wave.

• The wavelength in sound waves is the speed of the wave.

• The wavelength in sound waves is the distance between two consecutive points in a wave that are in phase.

• The wavelength in sound waves is the color of the wave.

How does the speed of sound change in different mediums?

• The speed of sound increases as the medium's density increases and as the medium's elasticity increases.

• The speed of sound remains constant in all mediums

• The speed of sound increases as the medium's density decreases

• The speed of sound decreases as the medium's density increases

What is the Doppler effect and how does it relate to sound waves?

• The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. In the case of sound waves, the Doppler effect causes the pitch of the sound to change depending on the relative motion between the source of the sound and the observer.

• The Doppler effect is the refraction of sound waves through different mediums.

• The Doppler effect is the reflection of sound waves off surfaces, creating echoes.

• The Doppler effect is the absorption of sound waves by different materials.

Discuss the applications of sound waves in various fields.

• Sound waves are only used in cooking applications

• Various fields like medical imaging, communication, navigation, industrial testing, music production, entertainment, and cleaning processes utilize sound waves.

• Sound waves have no practical use in any field

• Sound waves are primarily used for weather forecasting