Wave wavelength from speed 160 m/s and period 4.9 ms

[bfitzp]

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?

 

[raviem]

what is the answer?

 

[fzero]

You should check the units of what you computed.

 

[bfitzp]

The units are metres. Cant see why 784m is being marked as incorrect.

 

[fzero]

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.

 

[bfitzp]

Ah yes, don't know how I missed that. Cheers mate.