Sóng cơ truyền trên một sợi dây rất dài với khoảng cách giữa hai đỉnh sóng kế tiếp là 20 cm. Bước sóng $\lambda $ có giá trị bằng

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  A penalty shot is _______________ when a major foul is committed inside the 5-meter line.

   

• Choose the best answer for the following sentence:

  A dry pass, meaning the ball does not ________________ the water is thrown a few inches above the head of the catching player.

   

• Choose the best answer for the following sentence:

  _________________ is a sport in which you move along the surface of the sea or a lake on a long narrow board with a sail on it.

   

• Choose the best answer for the following sentence:

  Alexis _____________________ next week.
   

   

• Choose the best answer for the following sentence:

  The news of war _______________ and the world.

   

• Choose the best answer for the following sentence:

  The player _____________________.

   

• Choose the best answer for the following sentence:

  Before the end of the term, I ________________ all the required reading.

   

• Choose the word that has the underlined part pronounced differently from the rest:

  sprint                 line                    divide                  ride

• Choose the word that has the underlined part pronounced differently from the rest:

  swimming                    post                   decision                 score

• Choose the word that has the underlined part pronounced differently from the rest:

  style                   penalty                   prettỵ                  typical