What is the hottest part of the earth?
a. the crust
b. the mantle
c. the outer core
d. the inner core

Explain what will happen if decomposers were apsent from a forest ecoysystem.

Which component of the earth’s atmosphere is decreased due to photosynthesis?

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.