本题目来源于试卷: gc textbook chapter 13 temperature and kinetic theory，类别为 IB物理学
[问答题]
Figure 13–27 shows a d h /;vbkln0(aeld 6y2ciagram of a simple thermostat 3y 3p 8z-jmwuz90jhqq used to control a furnace (or other heating or cooling system). The bimetallic strip consists of two strips of different metals bonded together. The electric switch is a glass vessel containing liquid mercury that conducts electricity when it can flow to touch both contact wires. Explain how this device controls the furnace and how it can be set at differen zj3m3z0pju 9-hw8y qqt temperatures.
参考答案:
The device controls the furnace by the expansion
and contraction of the bimetallic strip.
As the temperature increases, the strip coils more, and as the
temperature decrease, the strip coils less.
As the strip changes shape, it will move the liquid mercury switch. In the diagram, if the switch were tilted
more to the right, the mercury would move and make contact between the heater
wires, turning on the heater. By
adjusting the temperature setting lever, the tilt of the mercury switch is
changed, and a different amount of temperature change is needed to tilt the
switch to the on (or off) position.
本题详细解析:
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