13. Potential energy saved in this system (Ue):
(A) 
(B) 
(C)
(D)

(E) none of above.
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統計: 尚無統計資料
統計: 尚無統計資料
13. Potential energy saved in this system (Ue):
(A) 
(B) 
(C)
(D)

(E) none of above.