Stellar system Q_(1) moves away from us at a speed of 0.800c. Stellar system Q_(2), which lies in the same direction in space but is closer to us, moves away from us at speed 0.400c. What multiple of c gives the speed of Q_(2) as measured by an observer in the reference frame of Q_(1)?

Stellar system Q_(1) moves away from us at a speed of 0.800c. Stellar

1.	Stellar system Q_(1) moves away from us at a speed of 0.800c. Stellar system Q_(2), which lies in the same direction in space but is closer to us, moves away from us at speed 0.400c. What multiple of c gives the speed of Q_(2) as measured by an observer in the reference frame of Q_(1)?
Answer» ANSWER :0.588

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Stellar system Q_(1) moves away from us at a speed of 0.800c. Stellar system Q_(2), which lies in the same direction in space but is closer to us, moves away from us at speed 0.400c. What multiple of c gives the speed of Q_(2) as measured by an observer in the reference frame of Q_(1)?

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