Ford is the second-largest U.S.-based automaker (preceded by General Motors) and the fifth-largest in the world based on 2010 vehicle sales. At the end of 2010, Ford was the fifth largest automaker in Europe.ord is the eighth-ranked overall American-based company in the 2010 Fortune 500 list, based on global revenues in 2009 of $118.3 billion. In 2008, Ford produced 5.532 million automobiles and employed about 213,000 employees at around 90 plants and facilities worldwide.
When the ratio of the gases becomes more in magma it causes the magma to disintegrate into pyroclasts, a combination of partially molten and solid fragments, and the volcano erupts explosively. chamber that is already brimming with magma of similar or different compositions.
Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup). It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it. As the magma rises, bubbles start to form from the gas dissolved in the magma. The gas bubbles exert tremendous pressure. This pressure helps to bring the magma to the surface and forces it in the air, sometimes to great heights.