Mass of sculpture given fm, mass, lengths etc

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In summary, the conversation discusses using equations to determine the mass of a heavy sculpture suspended by a steel wire in a strong wind. The equations used are v = sqrt(T/μ) and μ = m/L, with the additional experimental equation v = lambda f. The tension in the wire is caused by the weight of the sculpture, and the wavelength of the wave excited by the wire can help determine the wave velocity and ultimately the tension.
  • #1
tg22542
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Homework Statement



A heavy sculpture is suspended by a steel wire that is 91.0 cm long and has a mass of 5.40 g. In a strong wind, the wire hums at its fundamental frequency of 97 Hz. What is the mass of the sculpture?


Homework Equations



v = sqrt(T/μ)

μ = m/L


The Attempt at a Solution



I am pretty lost here. There is no velocity involved in the equation (I think) so I can't use the first equation, I tried messing around with the second equation and then plugging fm into v but no luck. Is there maybe an equation that I am missing here? Help!
 
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  • #2
You have not included the "experimental" equation, v = lambda f.
The "strong wind" is putting vibrational Energy into the wire, it is not blowing the sculpture sideways, which would increase the wire Tension.
So, the Tension is only caused by the sculpture weight mg.
the Wave excited by the string is resonating at the fundamental;
this means that the 2nd reflection reinforces the original wave; the wire displacement (transverse to its length) looks like ½ of a sine wave (node on both ends).
Once you recognize the wavelength, you can determine the wave velocity - then the Tension.
 
  • #3
tg22542, it can lead you well astray if you remember equations but not what the variables in them stand for. What did you think v stood for in v = sqrt(T/μ)?
 

1. What is the formula for calculating the mass of a sculpture?

The formula for calculating the mass of a sculpture is: Mass = density x volume. This means that the mass can be determined by multiplying the density of the material used to make the sculpture by its volume.

2. Can the mass of a sculpture be determined if the length and other measurements are known?

Yes, the mass of a sculpture can be determined if the length and other measurements, such as width and height, are known. These measurements can be used to calculate the volume of the sculpture, which is then multiplied by the density to determine the mass.

3. What units are typically used to measure the mass of a sculpture?

The mass of a sculpture is typically measured in grams (g) or kilograms (kg). In some cases, it may be measured in ounces (oz) or pounds (lbs) if dealing with larger sculptures.

4. Does the type of material used to make a sculpture affect its mass?

Yes, the type of material used to make a sculpture can greatly affect its mass. Materials with higher densities, such as metals, will have a greater mass compared to materials with lower densities, such as wood or plastic.

5. Why is knowing the mass of a sculpture important?

Knowing the mass of a sculpture is important for various reasons. It can help with transportation and installation, as well as determining the cost of materials. It can also be useful in conservation and preservation efforts, as the mass can affect the stability and structural integrity of the sculpture.

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