Fluid properties team problem3 a hydrogen-filled balloon to be used in high altitude atmosphere studies will eventually be 100 ft in diameter. at 150,000 ft, the pressure is 0.14 lb/in' and the temperature is - 67°f. assume the balloon is spherical in shape. what is the diameter of the hydrogen balloon at the ground at 14.7 lb/in and 68° f? volume =_π1.

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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