Timeline/Sequence — Development of Key Laws in Properties of Solids & Liquids — Notes

Year	Scientist	Contribution	Modern Relevance
1660	Robert Hooke	Hooke's Law: ut tensio sic vis (stress ∝ strain)	Foundation of elasticity; Young's modulus
1738	Daniel Bernoulli	Hydrodynamica — fluid pressure-velocity relationship	Bernoulli's equation; aerospace, hydraulics
1785	Charles-Augustin de Coulomb	Torsion and shear modulus	Shear modulus G; structural engineering
1807	Thomas Young	Young's modulus of elasticity defined	Y = FL/(A $\Delta L$ ); wire extension problems
1827	Simon-Denis Poisson	Poisson's ratio (lateral to longitudinal strain)	Advanced elasticity; composite materials
1841	Jean Louis Marie Poiseuille	Viscous flow in capillaries (Poiseuille's law)	Q = π $r^{4}$$\Delta P$ /(8ηL); blood flow, microfluidics
1845	George Gabriel Stokes	Stokes' law for viscous drag	F = 6πηrv; terminal velocity; sedimentation
1851	Blaise Pascal	Pascal's law — pressure transmission	Hydraulic systems; car brakes; presses
1879	Ludwig Boltzmann	Stefan-Boltzmann radiation law	P = σ $AT^{4}$ ; astrophysics; thermal engineering