Hai quả cầu giống nhau, ban đầu mang điện tích q1 và q2. Sau khi cho chúng tiếp xúc và tách ra, điện tích mỗi quả cầu là:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  There is no need to asking her about her school results.

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

  An has been sleeping for two hours what the telephone rang.

• Choose the best answer for the following sentence:

  He wants to know about my sister’s martial status so he asked her: "_____________ ?"
  
  

• Choose the best answer for the following sentence:

  ____________ is the distance from here to the airport?
  
  

• Choose the best answer for the following sentence:

  It’s my hobby to ______________ my favourite bike to school every morning.
  
  

• Choose the best answer for the following sentence:

  He didn’t get good mark ____________ he worked very hard.
  
  

• Choose the best answer for the following sentence:

  Ngoc: “______________ you to school on your first day?”

  Hoai: “My mother did.”
  
  

• Choose the best answer for the following sentence:

  Van: “Is this my new bike, father?”

  Father: “Yes, what _____________?”
  
  

• Choose the best answer for the following sentence:

   I couldn’t stop my brother ______________ drawing on my notebooks’ cover.

• Choose the best answer for the following sentence:

  Oanh: “Would you like some more carrots?”

  “ I _____________”