Recent content by firin81

  1. firin81

    Google made headphones, power to translate 40 languages

    What a great product
  2. firin81

    Undergrad Can Space Aircraft Reach Speed of Light in Vacuum?

    Thanks for all your comment.
  3. firin81

    Undergrad Can Space Aircraft Reach Speed of Light in Vacuum?

    As we known, the force applied to the plane that fly in the atmosphere is to keep plane moving forward. The force given is to against the pressure of the air. If a space aircraft flies in the vacuum, the force given to it will accelerate aircraft because there is no friction caused by air...