A tilting level is set up with the eyepiece vertically over a peg A (fig.). The height from the top of A to the centre of the eyepiece is measured and found to be 1.516 m. A level staff is then held on a distant peg B and read. This reading is 0.696 m. The level is then set over B. The height of the eyepiece above B is 1.466 m and a reading on A is 2.162 m. (à) What is the difference in level between A and B? (b) Is the collimation of the telescope in adjustment? (c) If out of adjustment, can the collimation be corrected without moving the level from its position at B?

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Mechanics of Solids

It is the study of the behavior of solid materials, their characteristics under various circumstances such as variation in external forces, temperature, and other internal factors. It is one of most important study in the field of engineering science, especially chemistry and mechanical engineering. In rigid body, the idealization of the solid body in which deformation is neglected. Deformation is known as the force acting on the solid state system which exerts change in its shape of the body but it continues to be at rest or in a uniform motion but it cannot accelerate. But those solid systems do have elasticity, compressibility and can be bent. This field is very vast since there are wide range of materials around us.