Galaxy A is reported to be receding from our galaxy at a speed of 0.35c. Galaxy B, located in precisely the opposite direction to Galaxy A, is also found to be receding from us at a speed of 0.35c. What recessional speed would an observer on Galaxy A find (a) for our galaxy, and (b) for Galaxy B

Aheat engine that operates on a carnot cycle has an efficiency of 0.420 when its low-temperature reservoir is at 10 ∘c.part aby how many degrees celsius must you increase the temperature of the high-temperature reservoir to increase the efficiency to 0.600 if you continue to use the same low-temperature reservoir?