Physics, 19.10.2021 21:30 fattypickeltoefungus
1: Hai thành phố A và B cách nhau 250km. Lúc 7h sáng,2 ô tô khởi hành từ hai thành
phố đó hướng về nhau. Xe từ A có vận tốc v1 = 60km/h, xe kia có vận tốc v2 = 40
km/h. Hỏi 2 ô tô sẽ gặp nhau lúc mấy giờ? tại vị trí cách B bao nhiêu km?
Answers: 3
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Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.
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1: Hai thành phố A và B cách nhau 250km. Lúc 7h sáng,2 ô tô khởi hành từ hai thành
phố đó hướng về...
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