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A mobile base station in an urban environment has a power measurement of 25 µW at 225 m. If the propagation follows an inverse 4th-power law, assuming a distance of 0.9 km from the base station, what would be a reasonable power value, in µW? 
 

Give your answer in scientific notation to 2 decimal places.

 Feb 7, 2021
 #1
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intensity1      distance24

intensity2            distance14     

 

 

25/x  =  9004 / 2254

 

x = .09766 uW       9.77 x 10-2  uW        ( I think !)

 Feb 7, 2021
 #2
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900 divided 225= 42       42 x 25=400       0.4x104 at 900m

 Feb 13, 2021
 #3
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How did you work out 900 divided by 225 = 4^2 ? 

Guest Feb 15, 2021

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