user-avatar
logada2022
2 năm trước
thả 200g đồng 120℃ vào 400g nước 25 ℃ . Cho Nhiệt dung riêng của đồng là 380 J/kg.K của nước là 4200J/kg.K 1) hãy chỉ ra vật tỏa nhiệt, vật thu nhiệt? tại sao? 2) tìm nhiệt độ của nước khi cần bằng nhiệt ( làm nhanh hộ em vs ạ, 2h em cần r)
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things. First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut down to produce paper products. It takes very little effort. It is not hard to place plastic and glass bottles, aluminum cans and paper in a bin. Anyone can do it. Second, we need to watch the amount of water used at home. It can be conserved by taking short showers instead of baths, repairing leaky faucets, using the dishwasher or washing machine only when fully loaded, or simply turning the faucet off while brushing your teeth. Third, we need to reduce waste. We need to recycle whenever possible, but should also try to use this waste effectively. For example, grass clippings and food scraps can be made into compost for plants. The average person produces 4.3 pounds of waste every day, but we can reduce that amount by recycling and reusing. If we do our part in our own homes, we can help keep the planet from becoming more polluted. Question 20. Recycling helps to reduce waste because_______ A. an average man produces compost for plants B. plants need to develop C. a person can do it in his home D. waste can be recycled and reused

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team