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Pressure is defined for every state of matter, but it matters most when discussing:
AVacuums
BFluids
CMagnets
DCrystals
Answer & Solution
Correct answer: B. Fluids
1. Liquids and gases are meant.
2. The whole topic is built around them.
3. They are fluids.
_Source: OpenStax University Physics Volume 1, Chapter 14, Fluid Mechanics._
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