Answer:
Dendrochronologists study tree rings to learn about past climates. Trees in temperate areas form one growth ring per year. Scientists can look at the rings and identify climate conditions during each year of the tree’s life. Scientists found long droughts in both the twelfth and thirteenth centuries. This is the same period when the Anasazi were leaving Chaco Canyon. Under normal conditions it was hard to support their villages in the harsh environment of northern New Mexico. When years of drought occurred, the densely populated Anasazi pueblos could no longer raise enough food. Other forces could have pushed the Anasazi away from Chaco as well.
Explanation:
The centripetal force of an object undergoing uniform
circular motion is half as great
as before when its radius is doubled and its speed remains constant.
To add, the centripetal force is <span>a force
that acts on a body moving in a circular path and is directed toward the center
around which the body is moving.</span>
<span>B) lincoln's election in 1860</span>
Abraham Lincoln is my answer
