What is the speed of a wave on the string?

AI Thread Summary
The tension in the string is 90N, with a length of 60cm and a weight of 34.44g, leading to a calculated wave speed of 39.6 m/s using the formula v = √(T/(m/L)). However, there is confusion about the expected answer being 396 m/s, prompting a review of the calculations. Participants suggest that the discrepancy may stem from a mistake in the provided values or the expected answer. The correct speed, accounting for significant figures, is noted as 39.62 m/s. Overall, the discussion highlights the importance of careful calculation and verification in physics problems.
Efast
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Homework Statement


The tension in the string is 90N; the string is 60cm long and has a weight of 34.44g. What is the speed of the wave on the string?
Answer: 396 m/s

Homework Equations


v = √ T / (m/L)

The Attempt at a Solution



v = √ 90N / (0.0344kg/0.6m)
v = 39.6 m/s

Huh? This looks like it should be pretty simple, plug in and get the answers...
What am I doing wrong, i need one more digit!??
 
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Your solution looks correct to me.

I once had a physics teacher who would dig through the questions and solutions so he could assign all of the ones that were wrong. A lot to be learned that way (like which professor never to sign up for again!)
 
The answer is 39.62 m/s, there must be a mistake in the given or answer! check you prof.
 
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