Melting: as mantle material rise toward the divergent plate boundary the pressure is reduced which causes melting
v2 = v1 + at
60 = v1 + 4*10 v1 = 20 m/s
Most of the excess energy is released as waste heat into the air surrounding the engine. Small amounts of excess energy are also released as sound energy, and as electrical energy generated by the alternator in a car's engine.
Answer:
a. It is constant the whole time the ball is in free-fall
Explanation:
If we divide the movement on its vertical and horizontal components, and we concentrate on the vertical component, let's call x-component, and analyze Newton's second's law:
with 
, 
the acceleration on horizontal direction and m the mass of the ball, because the only force acting on the object is gravity that is always vertical, there're not forces on the horizontal direction that means 
and by (1) that implies =0 there's not acceleration on horizontal direction.
Because acceleration is the rate at what velocity changes and there's no acceleration, there's no change in velocity, in other words velocity is constant on horizontal direction.
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.
