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 जो बीत गई सो बात गई 
( Jo Beet Gayi So Baat Gayi)

Written by Harivansh Rai Bachchan.


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project on adsorption

                     Adsorption Introduction There are several examples, which reveal that the surface of a solid has the tendency to attract and retain the molecules of the phase with which it  comes into contact. Thesemolecules remain only at the surface and do not go deeper into the bulk. Adsorption The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed  adsorption.   Adsorbate The molecular species or substance, which concentrates or accumulates at the surface is termed adsorbate . Adsorbent The material on the surface  of which the adsorption takes place is called adsorbent . Adsorption in action (i) If a gas like O2 , H2  , CO, Cl2  , NH3  or SO2   is taken in a closed vessel  containing powdered charcoal, it is observed that the pressure of the  gas in the enclosed vessel decreases. The gas molecules concentrate...
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Ms office shortcut keys and effect , window,#digieducation

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Laws of Motion – Class 11 Physics NCERT | Newton’s Three Laws, Formulas & Derivations

🧲 Laws of Motion – Class 11 Physics (NCERT) The Laws of Motion were given by Sir Isaac Newton and are fundamental to understanding force, motion, and mechanics in physics. This chapter from Class 11 NCERT explains how forces affect the motion of objects. 📘 Newton's First Law of Motion (Law of Inertia) Statement: A body remains at rest or in uniform motion in a straight line unless acted upon by an external force. 🔹 This law defines inertia – the natural tendency of objects to resist change in their motion. Inertia depends on mass. More mass → more inertia. 📌 Real-Life Example: You fall forward when a bus suddenly stops. 📘 Newton's Second Law of Motion Statement: The rate of change of momentum of an object is directly proportional to the applied force and takes place in the direction of the force. ✅ Derivation: Momentum, p = mv Rate of change of momentum = d(mv)/dt = m dv/dt = ma (if mass is constant) F = ma 📌 This is t...
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