Balloons with constant ascending velocity can be used to investigate wind velocities at various heights...
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Physics
Balloons with constant ascending velocity can be used to investigate wind velocities at various heights The given graph of elevation angle against time was obtained by observing a such balloon The balloon was released at distance L 1 km from the point of observation and it seemed to be rising dir ectly upwards Knowing that wind velocity near the ground was zero find the balloon s height at time t 7 min after its start and wind velocity at this height a deg 60 40 20 0 2 4 6 8 t min
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