Question

what are fuilds...........​

Answer 1

a substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid.

Answer 2

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In physics, a fluid is a substance that continually deforms under an applied shear stress, or external force. Fluids are a phase of matter and include liquids, gases and plasmas. They are substances with zero shear modulus, or, in simpler terms, substances which cannot resist any shear force applied to them.