Power required to generate a wave

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In summary, the question asked for the power supplied to generate a wave in a string with a linear density of 0.05 kg/m, tension of 80N, frequency of 60Hz, and amplitude of 6 cm. The relevant equations used were V=√T/m, P=1/2mvA^2w^2, and w/2pi=f. The calculated angular frequency was w=f*2pi and the average power was found to be P=1/2A^2w^2vm.
  • #1
AbhinavJ
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Homework Statement


Linear density of mass m = 0.05 kg/m
Tension = 80N
Frequency, f= 60Hz
Amplitude = 6 cm

The question asks the power supplied to generate such wave in a string.

Homework Equations


V=√T/m
P=1/2mvA^2w^2
w/2pi=f

The Attempt at a Solution


V=(T/m)^1/2
I calculated the angular frequency by w/2pi= f
Then I used the power for avg power
P=1/2A^2w^2vm
 
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  • #2
AbhinavJ said:

Homework Statement


Linear density of mass m = 0.05 kg/m
Tension = 80N
Frequency, f= 60Hz
Amplitude = 6 cm

The question asks the power supplied to generate such wave in a string.

Homework Equations


V=√T/m
P=1/2mvA^2w^2
w/2pi=f

The Attempt at a Solution


V=(T/m)^1/2
I calculated the angular frequency by w/2pi= f
Then I used the power for avg power
P=1/2A^2w^2vm
Your expression for P looks right to me. Do you have reason to believe your answer is wrong? If so, what do you get numerically and what should it be?
 

1. What is the definition of power required to generate a wave?

The power required to generate a wave is the amount of energy needed to produce the disturbance that creates the wave. It is typically measured in watts (W) or kilowatts (kW).

2. How is the power required to generate a wave calculated?

The power required to generate a wave is calculated by multiplying the force exerted on the medium by the velocity at which the disturbance travels through the medium. This can be represented by the equation P = Fv, where P is power, F is force, and v is velocity.

3. Is the power required to generate a wave constant or does it vary?

The power required to generate a wave can vary depending on factors such as the type of wave, the medium it is traveling through, and the amplitude of the wave. For example, larger waves typically require more power to generate compared to smaller waves.

4. How does the power required to generate a wave affect the size of the wave?

The amount of power required to generate a wave can directly affect the size of the wave. The greater the power, the larger the wave will be. This is because more energy is needed to create a larger disturbance in the medium.

5. Can the power required to generate a wave be controlled?

Yes, the power required to generate a wave can be controlled through various methods such as adjusting the force and velocity of the disturbance, as well as using different materials for the medium. Additionally, technologies such as wave energy converters have been developed to harness the power of waves for electricity generation.

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