3. The free body diagram below demonstrates
forces

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

ecologists can be teachers or research scientists. they can work for environmental organizations like the nature conservancy or for the government. they may work at museums, zoos and aquariums.