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Ta có: \(\omega=\sqrt{\dfrac{g}{l}}=\pi\left(\dfrac{rad}{s}\right)\)
Phương trình dao động: \(x=14,3cos\left(\pi t-\dfrac{\pi}{2}\right)\) (cm)
Thay t=0,25 ta được x=10,11cm
\(\Rightarrow tan\varphi=\dfrac{x}{l}\Rightarrow\varphi\approx5,8^0\)
Chọn D
Giải giúp e 4 câu này vs
Giải thích câu 8 giúp mình vs
Giúp em câu 35-40 với ạ
GIÚP MÌNH GẤP 24 CÂU NÀY VỚI Ạ!!
GIÚP MÌNH 16 CÂU TRẮC NGHIỆM NÀY NHÉ!!
16.
B. forgetting/ worry D. forget/ worrying 
42. A. to get B. getting nha
Mọi người giải xem giúp em ngữ pháp như vậy đã đúng chưa vơi ạ 🙏 When Quyen Linh was in high school, the school discovered that he had a talent for drama and cai luong singing, so he took part in a music training course. After that, Quyen Linh enrolled in the student group's entrance exam of the School of Dramatic Art and was accepted. He decided to go to Saigon to study. But because of poverty, at the beginning of his student life, Quyen Linh faced many obstacles as he did not have enough money to pay for school, he had to work while studying to have money to pay for his studies. After many years of hard work, luck finally smiled on Quyen Linh, when artist Kim Cuong called him to play the role of a supporting character in the play Loi Vu, the audience began to pay attention to the name Quyen Linh. Next is a series of opportunities for him. Until now, in addition to being a movie actor Quyen Linh is also known to many people as an MC. Although in the early days, Quyen Linh was once considered a "showy and clumsy" host, but then he quickly got used to this new role and gradually gained the audience's attention by acting as a host. his rustic, funny guide. From an excellent actor to a national MC, Quyen Linh possesses a rare talent and personality. He became famous thanks to his own ability, many times taking away tears of happiness and sympathy from viewers.
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CHUỖI SERIES CÂU HỎI ĐỀ LUYỆN THI ĐGNL ĐHQG TPHCM
[MÔN TIẾNG ANH NGÀY 3]
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