Câu 10: Vật A trong 20 giây dao động được 400 lần. Vật B trong 30 giây dao động được 300 lần. a.Tìm tần số dao động của hai vật? b. Vật nào dao động nhanh hơn? Câu 11: a.Một bạn đứng vỗ tay trước miệng một cái giếng sâu cạn nước. Sau 0,1 s kể từ lúc vỗ tay thì bạn ấy nghe thấy tiếng vang. Hỏi giếng sâu bao nhiêu mét? Biết vận tốc truyền âm trong không khí là 340m/s. b. Một người bạn của con đang muốn ghi âm một bài hát. Nhưng căn phòng khá rộng, và có tiếng vang khiến lời hát nghe không được rõ. Con sẽ khuyên bạn làm như thế nào để có thể làm giảm được tiếng vang trong căn phòng?

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P/s: Ai giúp với ạ !!! READ THE PASSAGE AND ANSWER THE QUESTIONS Tom Cruise (born Thomas Cruise Mapother IV; July 3, 1962) is an American actor and filmmaker. Cruise has been nominated for three Academy Awards and has won three Golden Globe Awards. He started his career at age 19 in the 1981 film Endless Love. After portraying supporting roles in Taps (1981) and The Outsiders (1983), his first leading role was in the romantic comedy Risky Business, released in August 1983. Cruise became a full-fledged movie star after starring as Pete "Maverick" Mitchell in the action drama Top Gun (1986). One of the biggest movie stars in Hollywood, Cruise starred in several more successful films in the 1980s, including the dramas The Color of Money (1986), Cocktail (1988), and Born on the Fourth of July (1989). In the 1990s, he starred in a number of hit films, including the romance Far and Away (1992), the drama A Few Good Men (1992), the legal thriller The Firm (1993), the romantic horror film Interview with the Vampire: The Vampire Chronicles (1994), the romantic comedy-drama sports film Jerry Maguire (1996), the erotic thriller Eyes Wide Shut, and the drama Magnolia (both 1999). In 1996, Cruise was well known for his role as secret agent Ethan Hunt in the Mission: Impossible film series, whose most recent film, Mision: Impossible-Rogue Nation, was released in 2015. 1/ What is the real name of Tom Cruise ? ______________________________________ 2/ What was his first film as an actor ? ______________________________________ 3/ What part did he play in Top Gun ? ______________________________________ 4/ What is the type of Interview with the Vampire ? ______________________________________ 5/ What is the latest film of Tom Cruise mentioned above ? ______________________________________