The term stress fracture, in many cases of overuse injury, is a misnomer. This term does not represent the nature and diversity of this frequently found injury. The term, âChronic Repetitive Stress Injury of Boneâ, better suits this injury in its myriad manifestations.he higher grades of stress injury are similar to fatigue fractures of other materials. Bone is noted to fail more readily in tension than in compression. This means that the forces which tend to âpullâ are more dangerous to bone failure and injury than compressive forces.
Wind power or wind energy describes the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power.
Learn how long humans have been using windmills, how big wind turbines can be, how much of the worldâs electricity is generated from wind power and much more. Wind power involves turning energy from the wind into other forms of useful energy. Wind power can be harnessed in a number of different ways.For example, windmills create mechanical energy, sails move boats and wind turbines generate electricity.Windmills have been around for a long time, they were used in Persia (Iran) as far back as 200 B.C. Wind energy is clean and renewable.Large groups of wind turbines are called wind farms. Around 80 different countries use wind power to generate electricity commercially (as of 2009). In 1997 wind power generated only 0.1% of the worldâs electricity, this increased to 1.5% in 2008 and 2.5% in 2010.ind energy is clean and renewable. Large groups of wind turbines are called wind farms. Around 80 different countries use wind power to generate electricity commercially (as of 2009). In 1997 wind power generated only 0.1% of the worldâs electricity, this increased to 1.5% in 2008 and 2.5% in 2010.