Khi cung cấp nhiệt lượng 1J cho khí trong xilanh đặt nằm ngang, khí nở ra đầy pitong di chuyển 2cm. Cho hệ ma sát giữa pitong và xilanh là 20N. Độ biến thiên nội năng của khí là?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Students _____________ the soccer team are asked to attend this afternoon at five.
  

• Choose the best answer for the following sentence:

  Anyone ____________ about the environment cannot ignore the facts _____________ the speaker was referring.
  
  

• Choose the best answer for the following sentence:

  Our puppy ______________ a car, ______________ he survived the accident.
   

• Choose the best answer for the following sentence:

  The parking lot surrounding the mall, which is especially busy right now, may be full, ______________ I would recommend taking the bus.
  

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

  inflation                      inhabitant                        renovation                        eliminate

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

  legal                      sector                       domestic                        investment

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

  subsidy                             substantial                           undergraduate                       drugtaker

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

  stagnant                      expand                        eventually                          landlord

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

  minority                          intervention                          commitment                         ethnic

• Choose a word that has different stress pattern:

  dissolve                      guideline                           reform                           expand