Early in the history of geology, scientists debated two different views of how geologic processes work. these two ideas became known as uniformitarianism and catastrophism. which of the following correctly describes the view of catastrophism?
a.) geologic changes only occur in sudden, devastating events.
b.) geologic changes only occur because of slow, gradual processes.
c.) geologic changes can be either sudden or gradual.
d.) geologic changes can quickly change earth's structure.

Afaulty model rocket moves in the xy-plane (the positive y direction is vertically upward). the rocket's acceleration has components ax(t) = ? t2 and ay(t) = ? ? ? t, where ? = 2.50 m/s4 , ? = 9.00 m/s2 , and ? = 1.40 m/s3 . at t = 0 the rocket is at the origin and has velocity ~v0 = v0x ? i + v0y ? j with v0x = 1.00 m/s and v0y = 7.00 m/s. (a) calculate the velocity and position vectors as functions of time. (b) what is the maximum height reached by the rocket? (c) sketch the path of the rocket. (d) what is the horizontal displacement of the rocket when it returns to y = 0?