Aweather balloon is filled with helium that occupies a volume of 5.00 × 104 l at 0.995 atm and 32.0°c. after it is released, it rises to a location where the pressure is 0.720 atm and the temperature is -12.0°c. what is the volume of the balloon at the new location?

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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a and c

c is 100% but i am confused in a