Electromagnetic Radiation-Really easy but I am stuck

[samdiah]

Homework Statement

How many wavelengths of radiation emitted by a 60 Hz electrical transmission line would it take to span the North American continent (a distance approximation 5.0*10^3 km).

f=60Hz
d=5.0*0^3 km=5.0*10^6 m

Homework Equations

v=fλ
Δd=vΔt

The Attempt at a Solution

Δt=d/v
= 1.67*10^-2

If speed is c then wavelength should equal c/f=3.0*10^8/60
=5.0*10^6

Which is absoloutely wrong since answer is 1.0.

Please help me and thanks in advance.

 

[Doc Al]

Δt=d/v
= 1.67*10^-2

Not sure what you are calculating here.

If speed is c then wavelength should equal c/f=3.0*10^8/60
=5.0*10^6

That's all you need. Hint: Units!

Which is absoloutely wrong since answer is 1.0.

Not as wrong as you think!

 

[samdiah]

Thank You very much!