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Viscosity in fluids is the analog of friction in solids. Both are methods by which the kinetic energy of moving bodies can be changed into thermal power. In the absence of friction force, a part of block could slide at constant speed with a horizontal surface in the same way; an object going by a no viscous fluid would experience no viscous drag friction. Lord Rayleigh has noticed out that, in a perfect fluid, a ship's propeller would not work but, on the other hand, a ship could not need a propeller.
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
composition of two SHM at right angle to each other and having time period in the ratio of 1: 2
During light activity, a 70-kg person may generate 200 kcal /h. Assuming that 20% of this goes into useful work and the other80% is converted to heat, calculate the temperature ris
Ca has atomic no. 20 and atomic weight 40. Which of the following statements is not correct about Ca atom: (1)The number of electrons is same as the number of neutrons (2)
Sol: The incident angle is 45 because the angle of reflection and angle of incident is equal.
Define Baron von Münchausen and Intergalactic Travel? Recently get archives of the late Baron von Münchausen brought to light some unpublished scientific papers. In one of them
What do we denote when we say that a capacitor has an amount of charge Q on it? Answer: If we obtain the expression the charge on the capacitor too accurately the value is
Experiencing a constant horizontal 1.10 m/s wind, a hot-air balloon ascends from the launch site at a constant vertical speed of 2.70 m/s. At a height of 202 m, the balloonist main
Bell's inequality (J.S. Bell; 1964) A quantum mechanical theorem shows that if quantum mechanics were to rely on hidden variables, it ought to have nonlocal properties.
Huygens wave theory: Huygen's wave theory is not correct in all respects. 2. It assumes simply that light energy is propagated as a wave. 3. At the time of his proposition
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