Tại cùng một địa điểm, hai vật được thả rơi tự do từ hai độ cao khác nhau  và . Khoảng thời gian rơi của vật thứ nhất lớn gấp đôi khoảng thời gian rơi của vật thứ hai. Tỉ số   bằng :        

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  There were ___________ a thousand people there buying tickets.
  
  

• Choose the best answer for the following sentence:

  It was _____________ I expected.
  
  
  

• Choose a word that has different stress pattern:

  neighbor                   extend                   resource                  comprise

• Choose the best answer for the following sentence:

  It was Ptolemy, a / an ______________, who propounded that the Earth was the center of the universe.

• Choose the best answer for the following sentence:

  The area ____________ New York to the south of Houston Street is known as Soho.

• Choose the best answer for the following sentence:

  England used to be the first ____________ country in Europe as well as in the world.

• Choose the best answer for the following sentence:

  The state is at least ___________ England.
  
  

• Choose the best answer for the following sentence:

  ______________ live in the capital than in the whole of the rest of the country.
   

• Choose the best answer for the following sentence:

  It was ____________________ I had expected.
   

• Choose the best answer for the following sentence:

  He finds physics ________________ other science subjects.