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  • 2021-12-01 19:31
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A charge is uniformly distributed over a spherical vloume with radius R where p=orthen the total charge Q is a. 4 5 TaR ... 查看全部

  • 2021-12-01 19:31
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  • 2021-12-01 19:31
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The magnetic moment for the square loop with side a and current is a la 3 b. la C. zero O d. la

  • 2021-12-01 19:31
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