Một chất điểm tham gia đồng thời hai dao động cùng phương, cùng tần số, ngược pha, với biên độ lần lượt là A₁ và A₂. Biên độ dao động tổng hợp của vật là: 

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the correct sentence which is built from the words and phrases given:

  During / weekends / she / cooks / bakes / and / many / types / cakes / of / and / cookies /.
  
  

• Choose the correct sentence which is built from the words and phrases given:

  her / helps / husband / her / clean / to / the / house /.
  
  

• Choose the correct sentence which is built from the words and phrases given:

  the / when / all / preparations / been / have / completed /, / she / feels / happy/.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  Have you ever hear about the Medecins Sans Frontieres (MSF)?

• Find a mistake in the four underlined parts of the sentence and correct it:

  It helps people who has suffered badly in wars or natural disasters.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Are you able to work independent as well as in a team?

• Find a mistake in the four underlined parts of the sentence and correct it:

  Do you need to have medical qualifications to work at that organisation?

• Find a mistake in the four underlined parts of the sentence and correct it:

  Do you think that the rewards of the volunteer work can enormous?

• Choose the correct sentence which is built from the words and phrases given:

  found / having / one / no / at / home /, / he / left / bad / the / house / a / temper / in /.
  
  

• Choose the correct sentence which is built from the words and phrases given:

  He / accused / of / cheated / having / was / in / his / final / exam / last / week /.