Which of the following best describes the amount of natural resources found here in the united states. coal is the only natural resources found in abundance in the US. Natural resources here are lacking and must all be imported to the us. Few natural resources are in abundance and the rest need to be imported to the US. Natural resources are found in abundane in the US.

Natural resources are found in abundance in the US.

Explanation:

The United States boasts of rich renewable and non-renewable natural sources.

Land: Large landmass is a huge advantage and being under one nation or government leads to great industrial, agricultural and economic development

Farmland: America boasts huge farmlands where mechanized agriculture is done on a large scale Minerals: A number of minerals like copper, gold, iron ore, coal etc are found in abundance Forests: The rich and different types of forests found in North America provides huge resources of timber

Water: The large coastline, huge lakes, and rivers all form a great resource for fishing, water recreational activities, oil drilling and other industries.

Energy sources: The U.S. is rich with energy sources like coal, oil, petroleum, and natural gas. Mining, especially of coal, is one of the chief industries in the U.S. The U.S. is a key oil producer in the World.

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared. 

Cardiac muscle causes movement in the bone.