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muốn tải công suất 50.000W từ nhà máy đến khu dân cư cách nhà máy 20km với HĐT giữa hai đầu dây tải điện là 10.000V và cứ 1km dây cói điện trở 0,5 ôm. a) CĐDĐ CHẠY QUA dây? b) công suất hao phí do tỏa nhiệt trên đường dây ?
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In Canada and the United States, one of the most popular days in the year is Halloween. Halloween is on October 31st. It’s a day when some people dress up in strange or unusual costumes. For example, they may dress up to look like an animal, a person from a book or movie or a famous person from history. In some places, children go to school in their Halloween costumes. After dark, many young children put on their costumes and visit their neighbours. They knock on the door and shout “Trick or treat!”, then the neighbours give them some candy or chocolate, and the children go on to the next house. Adults also enjoy dressing up for Halloween. There are usually Halloween parties in the evening and usually there is a prize for the best or most unusual costume. 1. What is one of the most popular days in the year in Canada and the United States? …………………………………………………………………………………………………………….. 2. Who do some people dress up to look like on Halloween? ……………………………………………………………………………………………………………. 3. What do some children in some places in Canada and the United States wear when they go to school on Halloween? ……………………………………………………………………………………………………………. 4. What do many young children do in the Halloween’s evening? ……………………………………………………………………………………………………………. 5. What are usually there in the Halloween’s evening? …………………………………………………………………………………………………………….

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