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<p>#1 Physics help<br /><small>The rate of flow of electromagnetic energy P through an area A placed normal to an electromagnetic wave will depend upon the permeability of free space μ0, and upon the instantaneous values of the electric field E, and magnetic field B. Find a possible relationship between these five quantities.</small><br />
11/1 23:10<br />
Amuro<br /></p>
<p>#2 <br /><small>有比答案 = dP/dt &#8733; AEB/μ0<br />
但要寫steps</small><br />
11/1 23:20<br />
Amuro<br /></p>
<p>#3 <br /><small>ele ..</small><br />
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