I need help QUICK!! 20 points Which of the following is/are formed as gravity pulls increasing amounts of dust and debris in a nebula together?

a. the solar wind

b. meteors

c. planetesimals

d. meteorites

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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i believe the answer would be:

d. violin, clarinet, french horn, and tuba