Mechanics

Bulk Modulus

Bulk modulus measures a material's resistance to uniform compression.

Variables

B
Bulk modulus
Resistance to compression
Pa
ΔP
Change in pressure
Applied pressure change
Pa
ΔV
Change in volume
Volume change
V
Original volume
Initial volume

Derivation

B = -V(dP/dV). The negative sign ensures B is positive since ΔV is negative for positive ΔP.

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