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21.將三個物體 A、B、C 自同一地點、同時斜向拋出後,三者的軌跡如右圖所示,其中 A 與 B 的水平射程相同,B 與 C 的最大高度相同。則下列敘述何者正確? (A) A 與 B 的拋射角一定會互
問題詳情
21.將三個物體 A、B、C 自同一地點、同時斜向拋出後,三者的軌跡如右圖所示,其中 A 與 B 的水平射程相同,B 與 C 的最大高度相同。則下列敘述何者正確?
(A) A 與 B 的拋射角一定會互餘
(B) A 的飛行時間比 B 的飛行時間長
(C) A 與 B 初速的水平分量相同
(D) B 與 C的飛行時間相同
(E) B 與 C 初速的鉛直分量不相同。
參考答案
答案:B,D
難度:非常困難0
統計:A(0),B(0),C(0),D(0),E(0)
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24.如【圖7】所示,若Vcc=12V、Rc=l k 、β=58,電晶體基射級順向導通電壓為0.7 V ’集射 極飽和電壓為0.4V,則可使電路得到最大不失真輸出訊號之電阻RB值約為多少? (A) 9
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