Một sóng cơ học có tần số f lan truyền trong một môi trường với tốc độ v. Bước sóng được xác định bởi biểu thức nào dưới đây?        

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  He advised me ____________ the facts before I made a decision ____________ the job.
   

• Choose the best answer for the following sentence:

  They have _______________ they cannot find time _________________.
  
  

• Choose the best answer for the following sentence:

  There ___________ mutual understanding between friends.
  
  
  

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

  machinery                 march                    cheerfully                  merchant

• Choose the best answer for the following sentence:

  The water was so polluted that the explorers could not drink it.

• Choose the best answer for the following sentence:

  His doctor advised him ____________, but he found it impossible ______________ his habit.
   

• Choose the best answer for the following sentence:

  Their company was made ___________ 100,000 USD in taxes.
   

• Choose the best answer for the following sentence:

  The Pikes has a painter ______________ all the windows of their house.
  
  

• Choose the best answer for the following sentence:

  They did not let us _____________ the lecture because we had not got a member card.
   

• Choose the best answer for the following sentence:

  He had spent ______________ that he was broke.