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A stone is thrown vertically upward at a speed of 35.30 m/s at time t=0. A...

A stone is thrown vertically upward at a speed of 35.30 m/s at time t=0. A second stone is thrown upward with the same speed 1.900 seconds later. At what time are the two stones at the same height?What is the downward speed of the first stone as they pass each other

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