Khoảng thời gian giữa hai lần kiền nhau để hai giọt mưa rơi xuống từ mái nhà là t. Khi giọt đầu rơi đến mặt đất thì giọt thứ 5 bắt đầu rơi. Lúc này, khoảng cách giữa giọt thứ 3 và thứ 4 là x. Lấy g = 10 m/. Nếu độ cao của mái hiên là 16 m thì x gần giá trị nào nhất sau đây?

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:

  The bill the shop manager sent to him was worth thousands of dollar.

• Choose the best answer for the following sentence:

  When someone is ___________, they are officially stopped from taking part in a particular event, activity, or competition, usually because they have done something wrong.

   

• Choose the best answer for the following sentence:

  _________ is the process of something becoming worse or weaker, or being made worse or weaker.

   

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

  Blue Whales are now threatened with extinct.

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

  Doctors are looking after the people who were serious injured in the accident.

• Choose the best answer for the following sentence:

  The contestant hit the target with _____________ great accuracy.

   

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

  rumor               unselfish                 number                   up

• Choose a word that has different stress pattern:

  brighten             friendship                  arrive              rumor

• Choose a word that has different stress pattern:

  acquaintance              unselfish                 enthusiasm              confidence

• Choose a word that has different stress pattern:

  benefit                 principle                 incapable                 constancy