One useful application for "some metals expand more than others when heated" is...?

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One useful application for "some metals expand more than others when heated" is...?

2007-02-12 13:38:08 · 2 answers · asked by ~ DN ~ 2 in Science & Mathematics ➔ Physics

2 answers

A Bimetallic thermometer. A strip of aluminum is bonded to a strip of copper. As the temperature changes, one of the metals expands faster than the other which causes deflection on the scale.

2007-02-12 13:41:28 · answer #1 · answered by tashley235 3 · 1⤊ 0⤋

In addition to the thermometer, many household thermostats use bi-metallic coils to open and close a switch as the house temp. changes. (I think NOT the newer, digital thermostats.)

2007-02-12 14:39:13 · answer #2 · answered by Richard S 6 · 0⤊ 0⤋