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AnnyKZ [126]
3 years ago
10

The buildup of charges on an object is called

Physics
2 answers:
In-s [12.5K]3 years ago
7 0

what whitey said he is right because he is smart

Nastasia [14]3 years ago
4 0
Static electricity.
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A certain electromagnetic wave traveling in seawater was observed to have an amplitude of 98.02 (V/m) at a depth of 10 m, and an
maksim [4K]

Answer:

The  value is   \alpha =  0.002 Np/m

Explanation:

From the question we are told that

  The first amplitude of the wave is  E_{max}1 =  98.02 \  V/m

  The first  depth  is  D_1 =  10 \  m

   The second amplitude is  E_{max}2 =  81.87 \  (V/m)

   The second depth is D_2 = 100 \ m

Generally from the spatial wave equation we have

   v(x) =  Ae^{-\alpha d}cos(\beta x  + \phi_o)

=>       \frac{v(x)}{v(x)} =\frac{  Ae^{-\alpha d}cos(\beta x  + \phi_o)}{ Ae^{-\alpha d}cos(\beta x  + \phi_o)}

So considering the ratio of the equation for the  two depth

\frac{A}{A_S}  =  \frac{e^{-D_1 \alpha }}{e^{-D_2 \alpha }}

=>   \frac{98.02}{81.87}  =  \frac{e^{-10 \alpha }}{e^{-100 \alpha }}

=>   \alpha  =  \frac{0.18}{90}

=>    \alpha =  0.002 Np/m

       

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3 years ago
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Answer:

The answer you have selected is correct.

Explanation:

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Brilliant_brown [7]
The best answer to this question is D. a god scientific question should be based on observations instead of just imagination.

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1) 1  2) 1 3)4  4) 1  5) 1 6)1  7)3  8)3  9)2   10)3

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