Which statement best describes the effects of drought, desertification, and erosion on the people who live in the sahel on the edge of the sahara desert?

a)these factors have led to warfare between tribes in the region. b)these factors have caused a great migration of people from the region. c)these factors have caused the united nations to declare the region endangered. d)these factors have led to hunger in the region because of a lack of arable land.

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

Increasing the pressure on one spot of a fluid will increase the pressure everywhere else in the fluid a. pascals principal b. archimedes' principal c. bernoulli's principal

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.