Trên một dây đàn hồi dài 1,35m đang có sóng dừng ổn định, có một đầu là một nút và một đầu là

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Trên một dây đàn hồi dài 1,35m đang có sóng dừng ổn định, có một đầu là một nút và một đầu là một bụng. Tốc độ truyền sóng trên dây là 2m/s. Chu kì của sóng là 0,35.Tính số bụng trên dây

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Fitness is the ability to perform only very light levels of physical activity.

Sorry i don’t know what to do

Gotta have a picture ^^

Athermometer to measure the temperature of course 

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