Recent content by salmise

  1. S

    Undergrad Speed of two spaceships relative to each other observed by an earth observer

    Nope, I am just going through the questions from past exams.
  2. S

    Undergrad Speed of two spaceships relative to each other observed by an earth observer

    Edit. I think the topic is misinformative and I don't know how to change it. Hey I have to translate this into english so bear with me. Two spaceships are approaching Earth from two directions along the x-axis. Earth observer(EO) calculates their speeds to be 0,8c each. Calculate at what...