Final answer:
The properties of metals, such as strength and ductility, typically change with temperature, often leading to decreased strength and variable ductility. Electrical resistivity generally increases with temperature while metals expand when heated. The efficiency of cooling hot metal with water or ice depends on the specific heat capacity of the cooling medium.
Step-by-step explanation:
The impact of temperature on the properties of metals is a complex phenomenon and generally depends on the specific metal and the temperature range considered. In many cases, increasing temperature will cause the metal's strength to decrease due to the increased atomic vibrations within the lattice structure, which can lead to a reduction in yield and tensile strength. Regarding ductility, in some cases, metals may become more ductile at higher temperatures, allowing for more plastic deformation. However, at certain temperatures, excessive ductility can lead to failure, and after a threshold, ductility might indeed decrease.
Moreover, the electrical properties, such as resistivity, generally increase with temperature in metals like copper due to increased scattering of electrons by vibrating atoms. Conversely, thermal expansion typically leads to an increase in a metal's size, as demonstrated in the curvature of bimetallic strips. Cooling a hot piece of metal using water or ice illustrates the concept of specific heat capacity, where typically water at a higher specific heat than ice will be more effective in absorbing heat without a significant increase in its own temperature.