Tại một điểm O trên mặt thoáng của chất lỏng yên lặng, ta tạo ra một dao động điều hòa vuông góc với mặt thoáng có chu kì 0,5 s. Từ O có các vòng tròn lan truyền ra xa xung quanh, khoảng cách hai vòng liên tiếp là 0,5 m. Vận tốc truyền sóng nhận giá trị nào trong các giá trị sau:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  By the time he arrives everything _____________.
   

   

• Choose the best answer for the following sentence:

  Not all necessary things ___________ for our trip that's why the departure ____________.

   

• Choose the best answer for the following sentence:

  The money ___________ to him two months ago, but it ____________ back yet.
   

• Choose the best answer for the following sentence:

  The business day was in high gear: the mail _________, documents were being typed, letters _________, talks ____________.
   

• Choose the best answer for the following sentence:

  On Friday afternoon before a three-day holiday weekend, the highways __________ people on their way out of the city.
   

• Choose the best answer for the following sentence:

  It's hard to believe that my application for a scholarship ____________. I was sure I'd get it. I don't know now if I'll go to school next year.
   

• Choose the best answer for the following sentence:

  The man died because medical help was not summoned. A doctor should _______________ immediately.
   

• Choose the best answer for the following sentence:

  "Can't we do something about the situation?''

   “Something _________ right now.”
   

• Choose the best answer for the following sentence:

  “Are you interested in scuba diving?”

  ''Very. Undersea life is ______________."
  
  

• Choose the best answer for the following sentence:

  The university ____________ by private funds as well as by tuition income and grants.