Một sợi dây đàn hồi căng ngang, đang có sóng dừng ổn định. Trên dây, Α là một điểm nút, B là điểm bụng gần Α nhất với AB = 18 cm, M là một điểm trên dây cách B một khoảng 12 cm. Biết rằng trong một chu kỳ sóng, khoảng thời gian mà độ lớn vận tốc dao động của phần tử B nhỏ hơn vận tốc cực đại của phần tử M là 0,1s. Tốc độ truyền sóng trên dây là:

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  The volunteers said that they _____________ the farmers to rebuild their houses at

  10 o’clock the previous day.

   

• Choose one sentence that has the same meaning as the root one:

  I did not answer the phone, even though I knew it was my husband calling, (despite)

   

   

• Choose one sentence that has the same meaning as the root one:

  The weather was beautiful but we did not go on a picnic, (of)

   

   

• Choose one sentence that has the same meaning as the root one:

  If I were you, I would speak to your boss, (to speak)

   

   

• Choose one sentence that has the same meaning as the root one:

  Why don’t we leave after breakfast on Saturday? (leaving)

   

   

• Choose one sentence that has the same meaning as the root one:

  He likes drinking wine. The wine is imported from Scotland.
  
  

• Choose one sentence that has the same meaning as the root one:

  I warned them against crossing the park at night, (to cross).

   

• Choose one sentence that has the same meaning as the root one:

  My mother bought the food this morning. It is very fresh.
  
  

• Choose one sentence that has the same meaning as the root one:

  Had he listened to me, he wouldn't have failed the driving test.

   

• Choose one sentence that has the same meaning as the root one:

  potholes / fill up / village roads / wide and clean.