Treo quả cầu bằng đồng vào một lức kế rồi nhấn chìm hoàn toàn vào trong bình tràn đựng đầy nước ta thấy lực kế chỉ 8N và lượng nước tràn ra có thể tích là 400 cm3.
a) Tính lực đẩy Ác-si-mét tác dụng lên quả cầu, biết dnước là 10000 N/m3
b) Tính khối lượng của quả cầu. Quả cầu trên đắc hay rỗng tại sao, biết ddồng là 89000 N/m3
express the following sentences in single sentences without altering their meaning
i kept you waiting. i'm sory he had seen the girl somewhere before. he remembered it he didn't say any words and left the house he wants to become a famous writer. he dreams of it it's said that his brother speaks French very well Polly didn't do her homework. she forgot i once met Mrs Trang Anh. I'll always remember it What about painting the shelves? But he didn't mean it the driver wanted to buy some cigarettes. he stopped the room í painted yellow. noone has slept in the room for year she invited me to dinner. it was very kind of hersắp xếp các câu sau
him / knows / ask / the / if / professor / he any / come / but / Sunday / day could / slowly / please / you / more / speak / a little the / stands / on / Thames / London / two / equal / it / into / devides / which / parts sad / wants / why / so / he / were / you / to / looking / know Peter / university/ when / she / to / is going / is / back/ asking