A landslide is a geological event caused by interactions between the four spheres. This landslide occurred after several weeks of steady rainfall. Explain how the landslide occurred in terms of potential energy and kinetic energy.

The rock and soil had gravitational potential energy at the edge of the road, overlooking the river. The rain added mass and caused the rock and soil to loosen. The rock and soil gained kinetic energy as it slid down into the river.

Explanation:

there is none because earth is stationary and flat.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.