Algol consists of a 3.7 msun main-sequence star and a 0.8, Ask an Expert

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Q. A 77g arrow is fired from a bow whose string exerts an average force of 95-N on the arrow over a distance of 82.00cm. What is the speed of the arrow as it leaves the bow?

Q. Algol consists of a 3.7 MSun main-sequence star and a 0.8 MSun subgiant. Why does this seem surprising, as a minimum at first?

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