Trên sợi dây đàn hồi dài 1m, 2 đầu cố định, đang có sóng dừng với 5 nút sóng ( kể cả 2 đầu ). Bước sóng của sóng truyền trên dây là:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  It’s my brother ____________ gave me this hat on my birthday.

   

• Choose the best answer for the following sentence:

  It was a letter ____________ she received from her aunt yesterday.
   

• Choose the best answer for the following sentence:

  It is ____________ who I want to make friend with.
   

• Choose the best answer for the following sentence:

  I’ve just learned to play the guitar, and I can only play a few simple _____________.
   

• Choose the best answer for the following sentence:

  Another hobby of my brother’s is _____________.
   

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

  The stranger asked me a lot of questions.
  
  

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

  We're going to visit our grandparents on Saturday.
  
  

• Choose a word that has different stress pattern:

  outdoor              pastime              include              garden

• Choose a word that has different stress pattern:

  shoemaker              practical            generous              improvement

• Choose a word that has different stress pattern:

  instrument              entertain               popular              quality