Hai dao động điều hòa cùng phương, cùng tần số, cùng pha, có biên độ lần lượt là $A_1$ và $A_2$. Biên độ dao động tổng hợp của hai dao động này là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Emperor Akihito of Japan was _______________ in Tokyo.
   

• Choose the best answer for the following sentence:

  A fund has been set up to give ______________ to the town’s cultural sites.
  
  

• Choose the best answer for the following sentence:

  A ____________ is a special place in which vou remember and praise a famous person, who was dead.
   

• Choose the best answer for the following sentence:

  The sea ______________ the sun’s warmth longer than the land
   

• Choose the best answer for the following sentence:

  Hanoi is located ____________ in heart of ____________ Red Delta.
   

• Choose the best answer for the following sentence:

  __________ Bay of Biscay lies to ___________ west of France.
   

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

  shrine                   recognize                    anniversary                    site

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

  rich                   architect                     change                    beach

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

  tomb                    combing                     climber                     combine

• Choose the best answer for the following sentence:

  The landscape is famous ____________ its bleakness.