A bimetallic strip is used in thermometers. It can also be used in different applications, such as coils found in thermostats and electrical breaker boxes.Know More
A bimetallic strip is comprised of two different metals. For it to be a bimetallic strip, the two metals must have different expansion coefficients. Brass and steel are common metals that are bonded together in a bimetallic strip.
When a bimetallic strip with brass and steel is heated, the brass will expand more the steel, causing the strip to curve with the brass on the outside. When the steel is cooled, it will curve with the steel on the outside. This works well in thermometers to help demonstrate the mercury rising as temperatures go up.Learn more about Thermodynamics
Thermal energy is used to cook food, heat buildings and generate electricity. The joule, named after James Prescott Joule, is the unit by which thermal energy is measured.Full Answer >
The bimetallic strip on an iron serves as a thermostatic switch to stop electricity from flowing to the heating element once the appliance reaches the desired temperature. The differences in the coefficients of expansion for the two metals that form the strip cause it to curve as it heats, eventually to the point it pulls away from the electrical contact and breaks the circuit.Full Answer >
Solar energy has been used by humans for 2,700 years. Originally, glass lenses were used to make fire with the sun's rays. According to the U.S. Energy Information Administration, the first recorded use of a solar thermal collector box was by British astronomer John Herschel in the 1830s. On a trip to Africa, Herschel used the box to cook food. In 2014, human beings use solar energy in many ways.Full Answer >
Bimetallic strip thermometers are comprised of two fused pieces of different metals that expand at different rates when heated. A pointing device is attached to the pieces of metal, and when the metals are heated, one piece expands faster than the other, causing the metal combination to bend and allowing the pointing device to move up or down a scale of degrees. When the metals cool, they move back to their original shape, allowing the pointing device to also move back down the scale.Full Answer >