Q. Which of the following applications does not involve thermal expansion?
निम्नलिखित में से किस अनुप्रयोग में थर्मल विस्तार शामिल नहीं है?
Explanation
Railway tracks, bridges with expansion joints, and bimetallic thermostats all deal with changes in dimensions due to thermal expansion.
Pendulum clocks, however, are actually negatively affected by thermal expansion. The length of the pendulum can change with temperature, which alters timekeeping accuracy—but the design of a pendulum clock does not utilize thermal expansion as a functional principle.
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