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THE MUSIC OF SOUND Sound : Sound is a form of energy which produces sensation of hearing in our ears. Production of sound : Sound is produce due ti vibrations of an object such as a stretched membrane or a string under tension. Waves: A wave is a disturbance movng through a medium when the particles of the medium set neighbouring particles in motion .A wave motion is a mode of transmission of energy through the medium .A wave in ehich the particled of the medium oscillate (vibrate)about their mean positions in a direction perpendicular to the direction of wvae propagation is called a transverse wave . A wave in which the particles of the medium oscillate (vibrate ) about their mean posiotions in a direction parallel to the direction of wave propagation is called a longitudinal wave. The particles do not move from one part to another part of the medium. Propagation of sound : Sound requires a medium for propagation  .i.e. ,it cannot travel through vaccum. Sound propagetes in the fo...

Solid Waste : Ecofriendly Management Solid waste is any unwanted and discarded material created by human beings Solid Waste Management : 1) Waste can be  a resource , if it is managed properly and wisely . 2) If disposed carelessly , it becomes a major source of pollution of soil and water . 3) Generation of solid waste can be linked with economic growth ,environmental degradation ,health hazards,pollution of air ,water and land and destruction of human habitat. 4) More than 5000,1700 and 900 tonnes of solid waste per day , is created in Mumbai , Pune and Nagpur respectively .Mismanagement of solid waste resulted in heavy floods of 26th July 2005 in Mumbai. 5) E-waste is generated by electronic goods like discarded computers , TV sets and  mobile phones.5 tonnes of e- wastes is generated daily in India. 3)Classifation of soild waste: 1) Soild wastes can be classifield according to the source of waste or according to its biodegrabilitty. 2) According to source : Domestic , ind...

      QUALITY FOOD , QUALITY LIFE Revolution for food: Food:  Food is neccessary for all living organisms . Carbohydrates, proteins, fats, minerals and vitamins are the important constituents of food. These growth , development and maintenenance. India needs more food grains to feed the ever increasing population . Better methods to increase food production and better crops are therefore necessary. Green Revolution: By using better ferilizers ,better methods of irrigation and introduction of HYV (high yield variety) seeds to improve food production is known as Green Revoution . This idea was generated by Dr. Norman Ernest Borlaug. Therefore he is known as "Father of the Green Revolution". White Revoution: Indian National Dairy and Developent Board ( NDDB) started a programme called "Operation Flood". After this initiative, India became largest producer of milk and milk produces. This movement is called the White Revoution . Prout. Verghese Kurien...

DATA AND FILE STRUCTURES DATA STRUCTURE Data are represented by data values held temporanily within programme's data area or recorded permanently on a file . Often the different data values are related to each other. To enable programmes to make use of these relationships, these data values must be in an organised form. The organised collection of data is called a data structure. The programmers have to follow certain rules to access and process the structured datda . We may,therefore , say data are represented as: Data Structure = Organised Data + Allowed Operations There are standard data structures which are often used in their own right and can form the basis for complex data structures . One such basic data structure called Array. Arrays are building block for more complex data structures .Designing and using data structures is an important programming skill. Asymptotic Notations : Time and space complexity is measured in terms of asymptotic notations. For example let us cons...

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