Thermal Expansion

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An iron rod, average linear coefficient of expansion 12 × 10^{−6} °C^{−1},
has a length of 15 m at 20 °C if the bar is heated to 150 °C find:

ä) The expansion of the bar;

b) The final length of the bar.

ä) The expansion of the bar;

b) The final length of the bar.

A square aluminum plate has an area of 2 m^{2} at 50 °C, if the plate is cooled to 0 °C its area
decreases from 0.0044 m^{2}. Find the coefficients of surface and linear expansion of aluminum

A container with an internal volume of 1 liter at 20 °C is heated to 100 °C. Find the internal volume of this
container, after heating knowing that the coefficient of linear expansion of the material is
15 × 10^{−6} °C^{−1}.

A container is filled with 125 cm^{3} of mercury at a temperature of 20 °C. The average
coefficient of expansion of the mercury is 180 × 10^{−6} °C^{−1} and the
coefficient of linear expansion of the glass is 9 × 10^{−6} °C^{−1}.
Find the volume of mercury spilled out when the temperature rises to 28 °C.

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