Một quạt máy quay với tần số 360vòng/phút.cánh quạt dài 0.8m.tính tốc độ góc và tốc độ dài của một điểm ở đầu cánh quạt

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10. studying / are / Computer Science / now./ we -> ………………………………………………………………………. 11. difficult / It's / to learn / for me/ English . → ………………………………………………………………………... 12. their housework/ with / helping / What about / old people ? → …………………………………………………………………………… 13. that lasts / The students/ a recess / 20 minutes/ have . → ……………………………………………………………………………. 14. interesting than / Listening/ is more/ watching films/ to music . → …………………………………………………………………………… 15. sports / to play / I / after school/ advise you . → ………………………………………………………………………………. 16. her / It takes / to school / about five minutes to go/ by bike . →. ………………………………………………………………………………... 17. playing / Mai / badminton/ fond of/ is . →………………………………………………………………………………… 18. with her friends/ interested in / Lan/ is / playing volleyball . → ……………………………………………………………………. 19. They / free / are usually / weekend / the/ on. . → ………………………………………………………………………. 20. Students / household appliances / to repair / learn how/ in Electronics . → ………………………………………………………………………..