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Pressure (P) waves move as displacements of particles perpendicular to the waves' direction of travel.
Irreplaceable
Something that cannot be replaced or substituted because of its unique qualities or significance.
Free Energy Change
A measure in thermodynamics indicating the amount of energy in a system that is available for work during a chemical reaction.
Endergonic Reactions
Chemical reactions that absorb energy from their surroundings, typically requiring an input of energy to proceed.
Exergonic Reaction
A chemical reaction that releases energy through the process of work, typically characterized by a negative Gibbs free energy.
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