Two astronauts who happen to be married to one another are working outside the international space station. They are separated by a distance of 13 m when they get upset with one another and start fighting. Astronaut H(mH =170kg including spacesuit) throws a 3 kg wrench at a velocity of 5 m/s towards his wife, Astronaut W(mW=155 kg including spacesuit). At that very same instant, astronaut W fires her jet pack so that she is traveling towards astronaut H at a constant velocity of 2 m/s. Astronaut W is able to catch the wrench and, with wrench in hand, she continues floating toward astronaut H. How much time elapses between the instant astronaut H throws the wrench and the time astronaut W catches up to him?

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