Calculating Wavelength with Wave Speed and Period | Physics Homework Help

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Homework Help Overview

The problem involves calculating the wavelength of a wave given its speed and period, specifically using the relationship λ = vT. The original poster attempts to compute the wavelength using a speed of 160 m/s and a period of 4.9 ms.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • The original poster calculates the wavelength but receives an incorrect result when submitting it online. Some participants suggest checking the units involved in the calculation, while others emphasize the importance of including unit conversions.

Discussion Status

The discussion is focused on identifying the source of the error in the original poster's calculation. Guidance has been offered regarding the need to verify units and perform necessary conversions, indicating a productive direction in the conversation.

Contextual Notes

The period is given in milliseconds, which may require conversion to seconds for the calculation to be correct. There is a noted confusion regarding the units of the computed wavelength.

bfitzp
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Homework Statement


What is the wavelength λ of a wave that has a speed of 160 m/s and a period of 4.9 ms?


Homework Equations


λ = vT


The Attempt at a Solution


λ = 160 x 4.9
= 784m


However this answer is showing up as inccorect when I submit it online. What am I doing wrong?
 
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what is the answer?
 
You should check the units of what you computed.
 
The units are metres. Cant see why 784m is being marked as incorrect.
 
bfitzp said:
The units are metres. Cant see why 784m is being marked as incorrect.

They're not metres and that's your problem. Go back and do the calculation again, but include the units and any conversions that you need to do.
 
Ah yes, don't know how I missed that. Cheers mate.
 

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