Heat Treatment of a Metal Bobby Pin - Hardening
An annealed bobby pin is heated, then cooled quickly; this process is called hardening. The hardened bobby pin is brittle.
An annealed bobby pin is heated, then cooled quickly; this process is called hardening. The hardened bobby pin is brittle.
Magnesium metal is not easily ground or crushed.
Iron metal is not easily ground or crushed.
Zinc metal is not easily ground or crushed.
Tin is a relatively soft metal that can be flattened.
Lead is a relatively soft metal that can be flattened.
Hematite and magnetite are formed from iron(II) and iron(III) solutions.
Hematite and magnetite samples are tested for magnetism.
Soap bubbles in a raft form grains of close-packed arrays with various orientations relative to each other.
The reactivities of lithium, sodium, and potassium with water are compared.