Để đưa một vật nặng 300N lên cao 4m bằng một ròng rọc cố định thì cần một lực ít nhất bằng bao nhiêu ? Tính khối lượng của vật nặng đó ?

Lm cho em câu 19 ạ,nhanh ạ,em đàn gấp,ghi đáp án là đc

1no matter where you go your family is still in your heart - when ever 2 i don't really like her even though i admire her achievements - much as 3 i was fascinated by what he said in his lecture though i hadn;t expected to be -much to 4 although the weather was cold we went out to relax - despite the fact 5 because the weather was bad spent last christmas at home -due to -owing to

I) If you dream of getting close to the wild side of the (1. nature) ____________ world, then join our Wildlife Tours! We offer classic wildlife safaris, (2. excite) ______________expeditions , family holidays, and tailor-made holidays. Our adventure holidays to Africa range from a week touring Kenya to the (3. ultimately) ______________ African adventure traveling from South to East Africa over one month! Perfect for families, groups of friends or solo (4. travel) ______________ , our safari holidays aim to offer you an (5. credible) ______________ wildlife experience. And remember, nothing gets your heart beating faster than hearing lions roar at night. II) II. Finish the second sentence so that it has the same meaning as the first one. 1. Minh doesn’t read many English books because he doesn’t have time. - If Minh ______________________________________________________________ 2. My sister studies at college. - My sister is a _________________________________________________________ 3. Some people talk too loudly in public places. I don’t like them. - I don’t like people who _________________________________________________ 4. The journey was interesting. - What _______________________________________________________________ 5. My brother can speak Italian very well. - My brother is fluent ___________________________________________________ 6. Your sister wants to become a tour guide. Your mum thinks she can succeed if she learns more about history and culture. (CAN)……………………………………………………….

giúp em hỏi câu 10 ạ em sẽ nhớ ch0 5 sao và cám ơn

III. Put the verb in brackets in the correct form: 11. It's the first time I (be) _______ to China 12. On the first days of Tet, people often (visit) ______ relatives and friends 13. Thanksgiving(be) _______ celebrated in the US on the fourth Thurday in November. 14. In recent years, Vietnam(develop) _______ quite rapidly. 15. The last train of the day (leave) _______ at 23:40

giúp e với ạ anh cj giỏi sinh giúp e với

tìm hai số có tổng là 11 và tích là 30 các bạn giúp em mk nhé

giúp mk trắc nghiệm 2 đề này vs , đúng nha

k,56+(-32)-78+44-10 ;l,32+/-23/-57+(-23)