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.
Solar energy. Solar energy is the energy that is in sunlight. It has been used for thousands of years in many different ways by people all over the world. As well as its traditional human uses in heating, cooking, and drying, it is used today to make electricity where other power supplies are absent, such as in remote places and in space. It is becoming cheaper to make electricity from solar energy and in many situations it is now competitive with energy from coal or oil. A solar cooker can be used for cookin