Discuss the merits and demerits of various theories of the formation of galaxies.​

Abird sitting high in a tree is an example of what type of wnergy

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.

Explain teen pregnancy from a sociological perspective.