that he judges toizontal and to be in line with the track. Thesor, who is standing on the ground nearby, observes the ba.to rise vertically. How high does she see the ball rise?J.) A river has a steady speed of 0.500 m/s. A student swims- upstream a distance of 1.00 km and swims back to the start-ing point. (a) If the student can swim at a speed of 1.20 m/sin still water, how long does the trip take? (b) How muchtime is required in still water for the same length swim?(c) Intuitively, why does the swim take longer when there isa current?A student swims upstream

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