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Tatiana [17]
3 years ago
6

Two sound waves (speed 343 m/s) have different wavelengths. The first has a wavelength of 5.72 m, and the second a wavelength of

11.44 m. What beat frequency do you hear from these two waves?
Physics
1 answer:
lys-0071 [83]3 years ago
6 0

Answer:

The beat frequency is 30 Hz

Explanation:

Given;

velocity of the two sound waves, v = 343 m/s

wavelength of the first wave, λ₁ = 5.72 m

wavelength of the second wave, λ₂ = 11.44 m

The frequency of the first wave is calculated as follows;

F₁ = v/λ₁

F₁ = 343 / 5.72

F₁ = 59.97 HZ

The frequency of the second wave is calculated as follows;

F₂ = v/λ₂

F₂ = 343 / 11.44

F₂ = 29.98 Hz

The beat frequency is calculated as;

Fb = F₁ - F₂

Fb =  59.97 HZ - 29.98 Hz

Fb = 30 Hz

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You apply a horizontal force of 25N to push a shopping cart across the parking lot at a constant velocity. a) what is the net fo
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(b) The the force of friction on the shopping cart is 25 N.

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The net force on the shopping cart is calculated as follows;

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Net force is zero, and frictional force is equal to applied force.

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Since frictional force limit motion, when the frictional force is smaller, the object tends to move faster.

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