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Q. A twelve-slit strobe disc is rotated at the max stopping frequency for a vibrating object. The strobe is rotated at 4.0 Hz.
(a) Evaluate the period of the vibrating object?
(b) If every second slit is covered with tape, how fast could the strobe now have to be rotated to "stop" the same object?
Give one example each for thermoplastic and thermosetting polymers Thermoplastics - Polyethylene, PVC etc. Thermosetting plastics - Bakelite (Phenolfomaldehyde resin), Urea
Q When calculate Planck's constant, a student's calculations produce values of 5.78 × 10 -34 J·s and 7.29 × 10 -34 J·s. If the accepted value is 6.63 × 10 -34 J·s, what is
WORKING OF TERRESTIAL TELESCOPE
An elevator is stopped at the ground floor. It starts moving upwards at constant acceleration a>0 for 5 seconds. It then keeps a constant speed for 35 seconds. Finally, it slows do
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Giger Muller counter (G.M tube) the operation principle of G.M tube is even small amount of ionization produced by single beta ray entering the tube can trigger discharge ,prod
What is Illumination? A body that gives off light is called luminous, like all those glow-in-the-dark toys, and a body that gives off light when it is heated is called incandes
Polarization: The dipole moment per unit volume of the solid is the sum of all the individual dipole moments within that volume and is called as 'Polarization' P of the solid.
working model
What does gravitational force depend on? Gravitational force depends on mass and distance. Therefore, the formula for calculating gravitational force among two objects with
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