Xác định nhiệt dụng của 1 kim loại thả 1 miếng kim loại có khối lượng 0,5 kg vào 0,5 lít nước từ 100°C xuống 40°C Biết độ tăng nhiệt độ của kim loại 30°C Biết nhiệt dung riêng của nước là 4200J/kg.K

pppmmmm..................................

Bài 10, 11,12,13 nha mik cần gấp

Lề : ai đặt avarta chung vs mền khum (aaaa... con j đó nó bảo nó đặt avar chung vs mik mà h biệt tăm bt tích rùi, ko thèm nữa, chắc đổi rùi chứ j, ms nói mik là con gái xg nó off lun T^T)... Vẽ anime bùn, or chibi.

hải đi từ nhà về quê với vận tốc 40km/giờ hết 1 giờ 30 phút . hỏi hải cần đi với vận tốc như thế nào để về trước 15 phút

Trình bày những giá trị mà sông ngoài mang lại. Nêu những biện pháp để bảo vệ sông ngoài nước ta

mình đang cần gấp mn giúp mình phần trắc nghiệm ạ

giúp hộ mình với nhé . Mình đang cần gấp

So sánh cuộc cách mạng tư sản anh và pháp

If people can wastes, they will save a lot of money. A.reuse B.reduce C.rebuild D.use ______new technology, we now have super smart TVs, smart phones. A.Because B.Because of C.Thanks D.Thanks to Robots will do most of the housework, ______we will have more time for our family. A.so B.but C.although D.if We should have recycling bins in each classroom for _____things. A.use B.reuse C.reused D.reusable If we plant more trees, the _____will be greener. A.neighbour B.soil C.air D.neighbourhood All of the machines will have a special card _____. A.start B.to start C.starting D.to starting If we _____all the trees, there will be no more oxygen for us to breathe. A.cuts B.cut off C.cutting D.cut down We should open all the windows, so we don’t _____use air-conditioners. A.have B.have to C.needn’t D.need Plant more trees in the schoolyard because they will provide shade and _____the atmosphere fresher. A.do B.make C.have D.use Our dream house will use only solar energy so that we can make the _____clean and green. A.nature B.environment C.kitchen D.home Many products are now helping you _____your energy bills. A.reduce B.reuse C.recycle D.cut down It takes a lot of energy to keep food cool, so don’t ____the fridge door open or putting hot things inside. A.make B.have C.leave D.stop Future houses will have hi-tech _____rooms for all of the family members. A.read B.to read C.reading D.to reading Our houses will use the sun or the wind ____electricity. A.to have B.to do C.to make D.to give In the future, cars might use energy from ____. A.gas B.water C.oil D.power Our dream house will be located ____the sea. A. on B. at C. in D.between 22. Don’t ____old things because perhaps you will need them later. A. throw B. throw away C. throwing D.throwing away 23. _____causes many breathing problems. A. Fresh air B. Fresher air C. Polluting air D.Polluted air 24. We won’t use CD players because we will have smart watches that _____music. A. play B. plays C. hear D. listen to 25. If you eat ______fast food, you will be fatter easily. A. very B. very much C. too much D. most III.Complete the first conditional sentences. If we stay at home, we (miss) _____the show. We (ask) _____about it, if you want. If he (want) ____it, we’ll buy it. If it (not/ work) _____, we’ll take it back. They (not/ go) _____on holiday this year, if their friends come to see them. You will be tired tomorrow if you (not/ go) _____to bed early. (the boys/ wear) _____their new T-shirts tomorrow if it is sunny? The cake (burn) ____if he doesn’t turn off the oven. We won’t go to the beach tomorrow if it (rain) ____. Will you walk to school if the bus (not/ come) _____soon? IV. Fill in each blank with ONE suitable word. 36. Soil pollution can make ____die. 37. What do these three Rs _____for? 38. If we all use this kind of bag, we’ll help to protect the ______. 39. We should find _____ways to reuse our old items before throwing them away. 40. If the river is not______ ,there will be more fish.