Cutlery
Cutlery, cutting implements, such as knives, razors, and scissors, used for industrial, commercial, and domestic…
Bran
Bran, the edible broken seed coat, or protective outer layer, of wheat, rye, or other cereal grain, separated…
Grinding
Sandpapers Sandpapers (coated abrasive) are the next most significant abrasive product. They…
Electrical discharge
Animal communication Animal communication, process by which one animal provides information that other animals…
Types of electromagnetic-radiation sources
Broadband-light sources Although flames and discharges provide a convenient method of excitation,…
Emission spectroscopy
Spectroscopy also provides a precise analytical method for finding the constituents in material having unknown chemical composition.…
Stone Age
Stone Age, prehistoric cultural stage, or level of human development characterized by the creation and use…
Gold
Gold (Au), chemical element, a dense lustrous yellow precious metal of Group 11 (Ib), Period 6,…
