Ann the Astronaut has a mass of 62.4 kg. She is space walking outside the space shuttle and pushes a 378.9 kg satellite away from the shuttle at 0.71 m/s. What speed does this give Ann as she moves towards the shuttle

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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temp rises, and expansion

f=ma newton

f=100x2.5=250n

d) physical means can be used to separate the components of air.