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Free Expansion process: In free expansion of gas, the gases enlarge in vacuum.
Thus, work done Δw=0
In free expansion if state changes from 1 → 2 only the initial and final states are called intermediate states are not given. Thus a path cannot be given as in the figure from 1 to 2.
what is Friction When we think about friction, there is one more place for energy to go - heat. When you push a book across a table, does the energy of the book change? Not if in
As defined in physics, work is: a) A scalar quantity b) Always a positive quantity c) A vector quantity d) Always zero Ans: As defined in physics, work
Figure shows the magnetic circuit of a relay. When each of the air gaps are 1.5mm wide find the mmf required to produce a flux density of 0.75 T in the air gaps. Use the B-H cu
Magnetism: 1. There are two types of magnetic pole north and south. 2. Like poles repel and unlike pole attract each other. 3. Magnetic substance produce magnetic field.
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Centripetal Force Requirement Uniform circular motion could be elaborates as the motion of an object within a circle at a constant speed. As an object moves within a circle and
Assume a crane lifts a 900 kilogram wrecking ball 12 meters above a concrete slab. 105,840 Joules of potential energy are kept in the wrecking ball. Now the ball is dropp
what is holography
Why material in solid state are crystalline Most of the materials in solid state are crystalline. Between these many are in the polycrystalline state. To get single crystal one
what is the physics principle involved in the lens maker equation
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