Metals are good conductors of heat, as compared to wood, glass and plastic. In heat transfer, the thermal conductivity of a material is the property that determines its ability to conduct heat. However, a difference in thermal conductivities can be influenced by certain factors such as temperature, magnetic field, electrical conductivity and thermal anisotropy.Know More
Metals have a high thermal conductivity and are therefore good conductors of heat. This is due to their structure. The atoms are close together and tightly packed. This is because the forces between the atoms are strong; therefore, energy is easily transferred between the atoms.
Wood and plastic have a low thermal conductivity, so they are poor conductors of heat because their atoms are far apart, and energy cannot easily be transferred between them.
Heat transfer across materials of high thermal conductivity occurs at a higher rate than across materials of low thermal conductivity. Materials with high thermal conductivity are used in heat sink applications, whereas, those with low thermal conductivity are used as insulators.
There are different modes of heat transfer. These include conduction, convection and radiation. Radiation is the simplest mode of heat transfer, because heat is not carried by moving atoms but by electromagnetic waves.Learn more in Chemistry
A conductor conducts electricity, and an insulator, or a dielectric, does not. A semiconductor falls between the two extremes and conducts less electricity than a conductor but more than an insulator. Siemens per meter (S/m) and reciprocal seconds are measures of conductivity. It is represented in equations by the Greek letters sigma, kappa or gamma.Full Answer >
Highly flammable materials refer to substances that are easily set on fire. Such items need to be stored carefully to prevent possible combustion. Examples of highly flammable substances include propane and ethanol.Full Answer >
Aluminum, like all other metals, conducts electricity, but it is not the best conductor of electricity. Pure gold, pure copper and pure silver all conduct electricity better than aluminum though aluminum is a more efficient conductor than zinc, nickel, brass, bronze, iron, steel, platinum and lead.Full Answer >
Potassium bromide will conduct electricity, after it is melted. Heat and liquid both release the ions in potassium bromide to permit free movement of particles, which allows it to become conductive, according to Everything Science, a site focused on spreading scientific knowledge.Full Answer >