poitepoiteのプロフィール

+2.6(ｐC)と-2.6(ｐC)の点電荷が8.2(cm)隔てて固定されているとき、2点を結ぶ直線の垂直2等分線上で、交点から5.8(cm)の地点にある1(pC)の点電荷に働く力の方向と大きさを求めよ。

Mike: Wait a minute , if my memory is correct , your wife used to wear a fur coat. Friend: I don't remember. Mike: Of course you do. It was large , like a tent. Friend: OK , you're right , she used to. But she doesn't any more. Mike: Has she , too , become an animal rights supporter? Friend: No, she stopped wearing it because I said that the last time I saw anything that looked like her in that coat , it was sniffing around a lamppost. So now she only wears it when she clears snow in front of the house. So I'm off the hook. Mike: But the worm isn't. Barbaric worm killer! Friend: Heartless meat eater!

Mike: I've agreed my wife wears a fur and , therefore , is barbaric. But what about you. I've seen your teeth tearing at a steak , a piece of lamb , and a slice of ham. How do you explain that , especially the ham? Did you know pigs are just about as smart as dolphins? Have you got no feelings for Porky Pig? Friend: I've got you there! I gave up meat a few years ago , but you didn't. Mike: Only because your doctor said that you had too much cholesterol in your blood. But you still go fishing. Friend: That's different. When I catch a big fish , I'm saving the lives of all the weak little fish the big fish would eat. I'm on the side of the little guy. Mike: What do you use for bait? Friend: Worms. Mike: The lowest living things , and you put them on a hook for sport. Shame , shame! Friend: See , you're ducking the matter of fur coats again.

（X＋1）（X－8）＋5Xを因数分解せよ と、いう問題です。