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tranngochauyen
2 năm trước
a. Một lực sĩ nâng quả tạ có trọng lượng 200N lên cao 2m trong thời gian 4 giây. Tính công suất của lực sĩ là bao nhiêu? (Cả tóm tắt nha)
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Father: Mike, where ________________ you last Monday at 10 a.m? Mike: I ________________ at school! F: No, you ________________. Here ________________ a letter from your teacher. You ________________ absent last Monday. Why?! M: No, I ________________ absent. This is a mistake and I can prove it. Darren and I ________________ at the school library. You can check the date on my library card. Mr. Bosser: Oh, no! My lucky pencil! Gone! Mrs Iron: What ________________ the matter, sir? Mr B: My lucky pencil ________________ here, next to the notebook. I ________________sure! And now it ________________here. Mrs I: ________________ you here all the time? Mrs B: No, I _______________ I _______________ at a meeting between 12 and 1 p.m. Mrs I: Ok, let’s ask the girl. Liz, Pat, come here, please! ________________ you at the office between 12 and 1 p.m? Girls: No, we ________________ We ________________ at the canteen. But the secretary ________________ here because there ________________ today’s letter on Mr Bosser’s desk. Look. Mr B: All right. Anyway, it________________ her pencil. Go back to work, girls. And thanks. Mrs Iron.

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