Tại 2 điểm A, B cách nhau 10 cm trong không khí, đặt 2 điện tích q1 = q2 = - 6.10-6C. Biết AC = BC = 15 cm. Lực điện trường do hai điện tích này tác dụng lên điện tích q3 = -3.10-8 C đặt tại C bằng Giải thích chi tiết giúp mik vs

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revision:imperatives write imperative statements 1.(not go) out.it's raining heavily 2.it's so cold.(close) the window please 3.(brush) your teeth right after meals 4.(not forget) to come bach early 5.(read) the story aloud 6.(not make) so much noise 7.(not talk) in class 8.(remember) to take good care of your teeth 9.(turn) off the cassette,please . it's so noisy 10.(not) eat green fruit , you'll be sick write sentences , use the cues given then turn into negative and interrogative 1.the students/grade 7/ go/excursion/last year ______________________________ ____________________________ _______________________________ 2.minh/be/fourteen/next month _____________________________ _________________________________- -_______________________________ 3.mr.brown/teach/english/now __________________________________ ___________________________________ _________________________________ 4.she/do/aerobics/every morning ___________________________ _______________________________ ___________________________________ 5.he/eat/a lot of sweets/last year _______________________ ________________________ __________________________ 6.they/have/party/tonight ____________________________ ______________________________ _____________________________ 7.she/forget/do/her homework/yesterday _________________________ ___________________________ ____________________________ 8.they /work/on/farm/at the moment ___________________________ _________________________ ___________________________ 9.he/often/play/sport/after school __________________________ _________________________ ___________________________ 10.the dentist/fill/the cavity/him/tomorrow _________________________________ ______________________________ ________________________________