Bài 4. Người ta kéo một vật có khối lượng 60 kg chuyển động thẳng đều lên mặt phẳng nghiêng có dài 4 m, chiều cao 2 m. a/ Tính trọng lượng của vật . b/ Tính lực kéo vật theo mặt phẳng nghiêng (bỏ qua ma sát). c/ Nếu không bỏ qua ma sát. Lực kéo vật là 400 N. Tính hiệu suất của mặt phẳng nghiêng.

Làm giúp tớ mấy câu trắc nghiệm này đi tớ cho 5 sao

cho abc $\geq$ 6 , bc $\geq$ 6 , c $\geq$ 3 chứng minh a+b+c $\geq$ 6

Tả hoạt động đang giảng bài cô giáo trong một tiết học trước mà em nhớ nhất Lưu ý : cô dạy tiếng anh nhé

REWRITE THE SENTENCES: 1, Do you mind if I watch you while you paint? (objection) → Do you ……………………………………………………… you while you paint? 2, It’s impossible to predict how long it will take to do this job. (telling) → There is ……………………………………………… will take. 3, Not many people buy that particular product these days. (demand) → There ……………………………………………… that particular product these days. 4, For me, his skill as a negotiator was most impressive. (how) → I was most ……………………………………………… negotiator he was. 5, The area was completely devoid of vegetation. (whatsoever) → There ……………………………………………… the area. 6, When he was at his most successful, the President had enormous influence. (height) → At ………………………………………………, the President had an enormous influence.

cho m=42-x/x-15 tìm số nguyên x để m đạt giá trị nhỏ nhất Làm hộ mình với

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Vẽ cái gì cute ikk Full màu nhoa các bấy by

giải pt `(x+1)(x+2)=(2-x)(x+2)`

Fill in the gaps with the right forms of the verbs in brackets to complete the following English sentences in Present Tenses: Simple, Continuous or Perfect. 44. In Spain women usually ________________ hats. (not wear) 45. Who ________________ that terrible noise? It is John. He ________________ his nose. (make, blow) 46. My dentist always keeps ________________ me to clean my teeth. I hate that. (tell) 47. He never ________________ to the theatre. (go) 48. I ________________ this weekend in Eastbourne. I ________________ there nearly every week. (spend, go) 49. My wife always keeps ________________ for more money at the end of the week. (ask) 50. Who ________________ to on the phone? (you speak) 51. I ________________ (not/do) the housework yet. 52. They ________________ (study) very hard recently. 53. She ________________ (promise) to help many times. 54. He ________________ (clean) the kitchen. Everything is sparkling clean. 55. She ________________ (write) her essay and ________________ (send) it to her professor. giải hộ mik nha