Hardest question on Physics exam

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An astronaut on the moon is attempting to calculate the local gravitational acceleration (g) using a wire and a mass. The problem involves sending a pulse down the wire, which takes 40.86 ms to traverse, and requires knowledge of the wire's length to determine the speed of the pulse. The discussion highlights the importance of understanding the relationship between tension, mass, and the speed of the pulse, with one participant referencing the equation for wave speed in a string. Another participant suggests using the frequency equation, which relates tension and mass per unit length. The conversation emphasizes the need for accurate calculations and the correct application of physics principles to solve the problem.
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An astronaut on the moon wishes to calculate the local g in the area. He sets up a wire with a mass of 1.7 grams and hanging from it an object with mass 4.98 kg. He sends some kind of pulse down the wire and calculates that it takes 40.86 ms to traverse the wire. What is g. You can neglect the mass of the wire when calculating the tension. That was everything that was given in the problem. I have not a clue how to solve it. What I did was just use the equation of T=2pi[sqrt(l/g)] to solve for g and hope that the wire acts like a spring or something. I'm totally sure that's incorrect, but hey I'm not an astrophysicist.
 
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Were you given the length of the wire? You'll need it.

You need to figure out the speed of the pulse along the wire. What does it depend on? What physical quantities determine the speed of the pulse?
 
Sorry. Yes, the length was also given. Though I can't remember the value of it anymore. Speed of the pulse I'm guessing is just x/t. X being the length and t being time, right? I don't think we've done problems involving speed of pulse, unless I'm completely unaware of it. A friend of mine told me he used frequency (f) = sqrt(T/μ), where T=tension and μ=mass/length. His way seems correct.
 
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