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A 2kg piece of copper at 200o C is taken out of a furnace and is allowed to cool in air with an ambient temperature of 25o C. Calculate the entropy change in the universe as a result of this process. The Cp of copper is 0.38 kJ/kg K.
Maxwell's demon (J.C. Maxwell): A thought experiment demonstrating the concepts of entropy. We have a container of gas that is partitioned in two equal sides; each side is in
Ergosphere The region about a rotating black hole, among the event horizon & the static limit, where rotational energy can be extracted through black hole.
Suppose you sound a 1056-Hz tuning fork at the same time you strike a note on the piano and hear 2 beats/second. You tighten the piano string very slightly and now hear 3 beats/s
how does a Vernier caliper work
According to de-Broglie theory, the wavelength of de-Broglie wave is given by Where h = Plank's constant, m = Mass of the particle, v = Speed of the particle, E = Energy of
A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons. What is the magnitude of the northward
what is turning force and moment force ?
Details about halls effect
what are advantages of identifying the center of gravity
Define Two-Dipole Interaction? Two classical dipoles with dipole moments μ 1 and μ 2 are separated by a distance R so that only the orientation of the magnetic moments is fre
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