What is the velocity of the dog relative to the road

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Q.A pet store suppply truck moves at 25.0 m/s north along a highway. Inside, a dog moves at 1.75 m/s at an angle of 35.0 east of north. What is the velocity of the dog relative to the road.

Q. Suppose there are 1.2×10^4 civilizations broadcasting radio signals in the Milky Way Galaxy right now. On average, how many stars would we have to search before we would expect to hear a signal? Assume there are 500 billion stars in the galaxy. How does your answer change if there are only 110 civilizations instead of 1.2×10^4?

Reference no: EM1362450

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