Một vật thực hiện đồng thời hai dao động điều hòa cùng phương có phương trình x₁ = A₁cos(ωt + φ₁) và x₂ = A₂cos(ωt + φ₂).Nếu độ lệch pha của hai dao động Δφ =  thì biên độ dao động tổng hợp là:

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Một số câu hỏi khác có thể bạn quan tâm.

• 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.
   

• Choose the best answer for the following sentence:

  It is important to protect landscapes _____________ the harmful effects of envi-ronmental population.
   

• Choose the best answer for the following sentence:

  Who will take care ____________ the children when we go out?
  
  

• Choose the best answer for the following sentence:

  Culture and historical places need ______________ carefully.
   

• Choose the best answer for the following sentence:

  The hotel is in a lovely ____________ overlooking the lake.
  
  

• Choose the best answer for the following sentence:

  Historical and cultural places in our country should be given appropriate ______________.
  
  

• Choose the best answer for the following sentence:

  Is __________ Phu Bai Airport near ___________ center of Hue?