Which geological feature is formed by a volcano?

Calderas

Calderas. Calderas are large-scale landforms that develop after enormous eruptions of magma empty underground magma chamber(s). The volcanic landscape above the void(s) collapses downward and forms the caldera.

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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0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr