Stellar system Q1 moves away from us at a speed of 0.75c. Stellar system Q2, which lies in the same direction in space but is closer to us, moves away from us at a speed of 0.35c. What multiple of c gives the speed of Q2 as measured by an observer in the reference frame of Q1? 0.788 away from Earth 0.788 toward Earth 0.542 toward Earth 0.542 away from Earth
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Stellar system Q1 moves away from us at a speed of 0.75c. Stellar system Q2, which lies in the same direction in space but is closer to us, moves away from us at a speed of 0.35c. What multiple of c gives the speed of Q2 as measured by an observer in the reference frame of Q1? 0.788 away from Earth 0.788 toward Earth 0.542 toward Earth 0.542 away from Earth
