roomor o electroencephalography. 4. What process is called a mechanical wave?Equation and graph of a plane harmonic wave Energy of a mechanical wave. Intensity units of measurement. 5. Sound, its nature Physical and physiological characteristics of sound.

1. A mechanical wave is a disturbance that propagates through a medium, transporting energy from one location to another. Mechanical waves require a medium to travel through, such as air, water, or solids. Examples of mechanical waves include sound waves, water waves, and seismic waves.2. The equation of a plane harmonic wave is given by: where: - \( y(x, t) \) is the wave displacement as a function of position and time , - is the wave amplitude, - is the wave number, - is the angular frequency. The graph of a plane harmonic wave shows a sine wave with a constant amplitude and frequency.3. The energy of a mechanical wave is proportional to the square of its amplitude. The energy carried by a wave can be calculated using the formula: where is the wave number and is the amplitude of the wave.4. The intensity of a wave is the power per unit area and is measured in watts per square meter (W/m²). The intensity of a wave can be calculated using the formula: where is the intensity, is the power of the wave, and is the area over which the power is distributed.5. Sound is a form of mechanical wave that propagates through a medium, typically air, by compressing and rarefying the particles in the medium. Sound waves are longitudinal waves, meaning the particle displacement is parallel to the direction of wave propagation. The nature of sound involves its production, transmission, and perception. Physical characteristics of sound include its amplitude, frequency, and wavelength. Physiological characteristics of sound involve how the human ear and brain perceive and interpret these physical properties.