N-N Tutorials

Regelation is defined as the phenomenon in which the ice melts to the water below 0°C on the application of pressure and refreezes back to ice on the removal of pressure. Regelation demonstrates the idea of compressing the ice and turning it into water under pressure and when the pressure is removed, it solidifies again. A few of the examples of regelation are: Glacier acts as a source of a river due to regelation. The mass of the glacier exerts pressure on the lower surface lowering the melting point of the ice at its base. This results in the melting of ice and propels the glacier to slide over the liquid. Under appropriate conditions, liquid water flows from the base of the glacier to lower altitudes when the temperature of the air is above the freezing point of water. Preparation of an ice ball – The ice slab is shredded into pieces, and the shredded pieces are pressurized around the tip of a stick to prepare the ice ball. If two small pieces of ice are taken and pressed against e...

What Young People and Their Parents Need to Know About SCOLIOSIS  Source: Books A Physical Therapist’s Perspective What is Scoliosis? Your spine has three slight curves—one in the neck, one in the upper back, and another in the lower back. These curves are normal and can be seen from a side view. From a back view, your spine should appear straight. If your spine has a side-to-side curve, the curve is called scoliosis. The curve may be very small—mild.It may be bigger—moderate.Or it may be sharp—severe. Scoliosis is not poor posture and is not caused by the way you carry objects. Scoliosis is not a disease. You cannot catch scoliosis from someone else and you cannot prevent it. For most people who have scoliosis, the causes are not known. Who Gets It and When  Both boys and girls can develop scoliosis. About the same number of boys and girls develop the mildform. Moderateor severe scoliosis is more common in girls than in boys. Up to 10 in 100 young people will develop at leas...