Physical Sciences
- Bond number, in fluid mechanics, a dimensionless number expressing the ratio of gravitational forces to surface tension forces
- Chemical bond, the physical phenomenon of chemical substances being held together by attraction of atoms
- Covalent bond, between nonmetals
- Ionic bond, between metal and nonmetals
- Metallic bond, between metals
- Bond albedo, a measure of the electromagnetic radiation reflected from an astronomical body
- Bond graph, a graphical description of a physical dynamic system
- Bond fluctuation model, a lattice model for simulating the conformation and dynamics of polymer systems
- The Bond (Chinese constellation), both a mansion in the White Tiger constellation and an asterism within that mansion
- Bond Crater, a crater on Mars
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—Catherine E. Beecher (1800–1878)
“These modern ingenious sciences and arts do not affect me as those more venerable arts of hunting and fishing, and even of husbandry in its primitive and simple form; as ancient and honorable trades as the sun and moon and winds pursue, coeval with the faculties of man, and invented when these were invented. We do not know their John Gutenberg, or Richard Arkwright, though the poets would fain make them to have been gradually learned and taught.”
—Henry David Thoreau (1817–1862)