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A rotating platform of moment of inertia completes one rotation in 20 seconds. A person of mass is standing at the centre of platform. If the person moves at a distance of from the centre along the radius then find the angular velocity of the platform.
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A spherical solid ball of mass 1kg and radius 3 cm is rotating about its own axis with an angular velocity of 50 radians per second. Find its kinetic energy of rotation.
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Find the initial momentum of electron if the momentum of electron is changed by and the De Broglie wavelength associated with it changes by 0.40%
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Appeared in Year: 1996
Two soap bubbles each of radius 20 cm are touching each other. The radius of curvature of the common surface will be – [RPMT]
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b. | r | |
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d. |
Appeared in Year: 1989
Two charges of and are placed apart, the ratio of force exerted by both charges on each other will be – [RPET]
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d. |