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    Initial velocity required depend on the mass of projectile

    Does the Initial velocity required depend on the mass of projectile to impart a projectile of perticilar angle and perticular height?
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    Surface Tension: Force, Unit & Questions

    By definition, surface tesnsion is the force at the surface of separation of two fluids and it's unit is N/m. my doubts are 1. Is it the force per unit length? 2. Does Surface tenson changes with change in lenth of the liquid container?
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