Question

Допоможіть будь ласка 1)Звукові коливання розповсюджуються у воді із швидкістю 1496 м/с, а в повітрі - 340 м/с2)Знайти довжину хвилі у воді, якщо період коливань 0,005 с3)у скільки разів зміниться довжина звукової хвилі при переході звуку повітря у воді

Answer 1

Відповідь: Див. додаток

Пояснення:

Answer 2

Speed of Sound in Water and Air

The speed of sound in water is 1496 m/s, while in air it is 340 m/s [[1]].

Finding the Wavelength in Water

To find the wavelength in water, we can use the formula:

wavelength = speed / frequency

Given that the period of oscillation is 0.005 s, we can calculate the frequency using the formula:

frequency = 1 / period

Substituting the values, we have:

frequency = 1 / 0.005 = 200 Hz

Now, we can calculate the wavelength using the formula:

wavelength = speed / frequency

Substituting the values, we have:

wavelength = 1496 m/s / 200 Hz = 7.48 m

Therefore, the wavelength of the sound wave in water is 7.48 m.

Change in Wavelength when Sound Travels from Air to Water

When sound travels from air to water, the wavelength changes. The speed of sound in water is greater than the speed of sound in air. Therefore, the wavelength of the sound wave will decrease when it travels from air to water.

To calculate the change in wavelength, we can use the formula:

change in wavelength = initial wavelength - final wavelength

Let's assume the initial wavelength in air is λ_air and the final wavelength in water is λ_water.

The speed of sound in air is 340 m/s and the speed of sound in water is 1496 m/s.

Using the formula:

change in wavelength = λ_air - λ_water

Substituting the values, we have:

change in wavelength = (speed in air / frequency) - (speed in water / frequency)

Simplifying the equation, we get:

change in wavelength = (340 m/s / frequency) - (1496 m/s / frequency)

Since the frequency remains the same, we can cancel it out:

change in wavelength = 340 m/s - 1496 m/s = -1156 m/s

Therefore, the change in wavelength when sound travels from air to water is -1156 m/s.

Please note that the negative sign indicates a decrease in wavelength.