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In a gas -filled container, a molecule of speed `200 m//s` collides at an angle of `30^@` with the horizontal face of this container, and rebounds with the same speed. Is the collision elastic or inelastic? In this momentum conserved in this collision?

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As the molecule rebounds with the same speed , the collisions is elastic. The momentum is always conserved in a collision, irrespective of whether the collision is elastic or inelastic.
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CHHAYA PUBLICATION-KINETIC THEORY OF GASES-HIGHER ORDER THINKING SKILLS (HOTS) QUESTIONS
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