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JEE Main 2020 (Online) 2nd September Evening Slot
Numerical
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A particle of mass m is moving along the x-axis with initial velocity $$u\widehat i$$. It collides elastically with a particle of mass 10 m at rest and then moves with half its initial kinetic energy (see figure). If $$\sin {\theta _1} = \sqrt n \sin {\theta _2}$$ then value of n is ________. JEE Main 2020 (Online) 2nd September Evening Slot Physics - Center of Mass and Collision Question 73 English
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JEE Main 2020 (Online) 2nd September Evening Slot
Numerical
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A wire of density 9 $$ \times $$ 10–3 kg cm–3 is stretched between two clamps 1 m apart. The resulting strain in the wire is 4.9 $$ \times $$ 10–4. The lowest frequency of the transverse vibrations in the wire is : (Young’s modulus of wire Y = 9 $$ \times $$ 1010 Nm–2), (to the nearest integer), _________
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