. Hai quả cầu kim loại nhỏ, giống hệt nhau, tích điện q1 = 2C; q2 = –4C, đặt cách nhau một khoảng r trong không khí thì hút nhau một lực F1=16N. Nếu cho chúng chạm nhau rồi đưa về vị trí cũ thì chúng

1. Công mà khối khí sinh ra là 1000 J, nếu nội năng của khí tăng một lượng 500 J thì nhiệt lượng nhận vào là? A. –1500 J. B. –500 J. C. 1500 J. D. 500 J. 2. Trường hợp nào dưới đây làm biến đổi nội năng KHÔNG do thực hiện công? A. Mài dao. B. Khuấy nước. C. Đóng đinh. D. Nung sắt trong lò.

Rewrite using the word given without changing it. Use between TWO and FIVE words, incl. the word given. 1. The hotel doesn't let guests use the pool at night. ALLOWED Guests ARE NOT ALLOWED TO USE the pool at night. 2. "Please don't call me before 8 am," said Rachel. RATHER "I ………………………………………………………………………………… me after 8 am," said Rachel. 3. Nicole said she wasn't in the mood to go shopping. LIKE Nicole said she didn't ………………………………………………………………………………… shopping. 4. My cousin Josh is too young to learn to drive. TAKE My cousin Josh isn't ………………………………………………………………………………… lessons. 5. Tom's doctor told him to stay in bed. INSISTED Tom's doctor ………………………………………………………………………………… in bed. 6. You really ought to start looking for a job. HIGH It ………………………………………………………………………………… for a job. 7. That film is a waste of time. WORTH It ………………………………………………………………………………… that film. 8. I don't know why William moved to the country. MADE I don't know ………………………………………………………………………………… to the country.

cho tam giác abc nhọn , đường cao AE, CI cắt nhau tại H. a) CMR; tam giác AIH đồng dạng tam giác AEB b) CMR: góc ABH= góc AEI c) BH cắt AC tại D. CMR:BH.BD+CH.CI=BC bình d) DI cắt BC tại M. CMR: MI.MD=MB.MC mn giúp mình với ạ

Mickey Bushell was born with a rare medical problem affecting his back that meant he would never be able to walk. However, he refused to let this problem (1) ……. him from doing the things other children do. At school, Mickey (2) ……. part in a wide variety of (3) ……. despite being in a wheelchair. During a trip to an Outdoor Education Centre, the (4) ……. were amazed to see him having a (5) ……. at canoeing along with other pupils. Mickey took (6) ……. wheelchair racing at the age of eleven, and was (7) ……. to succeed. After training for a few months, he entered two races in a wheelchair-racing championship. He was (8) ……. against more experienced athletes, but he took the (9) ……. in both races and actually beat his (10) ……. easily. This was the beginning of a very successful career. In May 2009, he (11) ……. a new 100-metre world record in men's wheelchair racing. Despite a (12) ……. training schedule, Mickey supports the charity Get Kids Going in his spare time. It encourages children with special needs to participate in sport. 1. a. keep b. hold c. turn d. stay 2 a. played b. took c. had d. made 3. a. observations b. rehearsals c. gymnastics d. activities 4. a. supporters b. umpires c. instructors d. referees 5. a. go b. chance c. look d. fun 6. a. up b. print c. out d. over 7. a. dedicated b. decided c. absorbed d. compulsive 8. a. winning b. going c. competing d. trying 9. a. front b. field c. lead d. start 10. a. sprinters b. opponents c. enthusiastsd. contestants 11. a. beat b. held c. broke d. set 12. a. hectic b. relaxing c. reward d. congested

they are going to sell their old house(plan) ->They.... their old house

vẽ anime/chibi puồn hoặc vt calli: Tủi thân tone màu lạnh @Mint

Biết AB // CD. ∠ECD = 50 , ∠AEC = 80. Tính ∠BAE

Thầy cô giúp em câu này với em cảm ơn

Cho y=1/3x^3 -mx^2+(m+2)x-m^2+1 Tìm m để hàm số đồng biến trên (1;dương vô cùng) Ai giúp mình với