大學物理~ 質能互換 及有關電場的問題!

1.利用質能互換 試計算質子的能量 用ev表示2.An equilateral triangle is formed from three rods

each of length10 cmTwo of rods carry charge 16 nC uniformly distributed along thelength of eachrod

while the third carries charge -16nC

also uniformly distributed along the rod.What is the magnitude of the electric field at the center of the triangle?答案 1.7*10^5 N/C3.A dipolecentered at the origin with moment5*10^-6 C is oriented at an angle of π/6with respect to the x-axis. The positive charge is in the first quadrant. Find the torque an eletric field of 9*10^6i 向量 N/C excerts on the dipole.答案 : - 25 k向量 Nm抱歉各位了~ 我的物理不太好 麻煩各位幫我列一下算式 ~ 謝謝了!!
1) 質子質量 = 1.66 x 10-27 kg能量值為1.66 x 10-27 x (3 x 108)2 = 1.494 x 10-10 J = 9.3375 x 108 eV2) 3) The dipole moment in vector form is:(2.5 x 10-6 i 2.5√3 x 10-6 j)C mHence the dipole moment is:(9 x 106 i) x (2.5 x 10-6 i 2.5√3 x 10-6 j) = -25k N m 參考資料 原創答案

equilateral triangle methodequilateral triangle,dipole moment,rods,positive charge,electric field,ev,magnitude,torque,vector,respect

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