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(i) A disk shaped flywheel of uniform density _, outer radius R and thickness w. rotates with angular velocity _, obtain an expression for the moment of inertia 2
vol I =_ρ r dV , in terms of ρ, R and w. Show that the kinetic energy of the
flywheel is given by the relationship 1 2
2 KE = Iω.
(ii) Air is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having a face area of 0.01 m². The mass of air is 4 g and initially a pressure of 100 kPa on the top of the piston. Heat transfer of magnitude 1.41 kJ occurs slowly from the air to the surroundings and the volume of the air decreases to 0.0025m³. Neglecting friction between the piston and the cylinder wall, determine the change in specific internal energy of the air, in kJ/kg.
DIMENSION of Newton DIMENSION ? The dimension of force is [MLT -2 ]
Q. In 17 Cl 35, Compute the number of protons, neutrons and electrons. Number of electrons = 17, Number of protons = 17, Number of neutrons = 18
GYROSCOPES: PRINCIPLES Gyroscopes are rotating masses (usually cylindrical in form) which are deliberately employed because of the particular properties which they demonst
The term pure iron is meant a ferrous material with an extra low carbon content for example low carbon steel and electrolytic iron. In low carbon steel carbon content is less than
Lead: Atomic number 82 Symbol Pb Atomic weight 207.2 Discovery Known since pr
Larry's gravitational potential energy is 1870Jas he sits 2.20 m above the ground in a sky diving airplane. What is Larry's gravitational potential energy when he begins to jump fr
Explain the applications of polarization of light? Write any four applications of interference of light. Illustrate how plane polarized light obtained by reflection.
Q State Joule's law of heating? The heat produced in a conductor is (i) Unswervingly proportional to the square of the current for a given R (ii) Unswervingly proportiona
at what velocity a clock should move so that it seems slow by one minute in a day?
what is band gap?
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