如图8所示,在一条直线上有两个相距0.4 m的点电荷A、B,A带电荷量+Q,B带电荷量-9Q.现引入第三个点电荷C,恰好使三个点电荷处于平衡状态,问:C应带什么性质的电荷?应放于何处?所带电荷量为多少? 图8 答案:负电 A的左边0.2 m处 -Q
阅读对话,选择正确答案。
a. You're welcome.b. I'II show you. c. May I turn on the TV?d. The TV is too loud.e. How do you turn it on?A: ____________ B: Sure. A: ____________ B: Press the bottom. Here. A: Oh! ____________ How do you turn it down? B: ____________A: That's better! Thank you.B: ____________