Physics, 31.08.2021 03:40 nehemiahw7020
trên mặt chất lỏng có hai nguồn kết hợp phát ra hai dao động cùng pha u2=u1=Acoswt(cm) s1s2=4 bước sóng. trên đoạn s1s2 có bao nhiêu điểm dao động tổng hợp có biên độ A căn 2
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An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.
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trên mặt chất lỏng có hai nguồn kết hợp phát ra hai dao động cùng pha u2=u1=Acoswt(cm) s1s2=4 bước s...
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