The characteristic of matter you are referring to is called a physical property. The ability to melt is an example of a physical property exhibited by ice, where it changes from a solid state to a liquid state when heated.
Bronze is obtained by mixing copper with other metals, typically tin. The specific proportions of copper and tin can vary, but typically bronze contains around 90% copper and 10% tin. The metals are melted together and then cooled to form the alloy bronze.
Each motor has a published manufacturer Lock Rotor Amperage (LRA) rating that is used to obtain this ratio. If a manufacturer otained a reading of 100A while bench testing their motor (equipment) at full load, if the motor FLA (Full Load Anps) is 50 amps, the raito LRA to FLA is 2 to 1 or 200%.