A piece of metal weighs 45 {\g} in air and 25 {\g} in a liquid of density 1.5 \times 10^3 {\kg}- {\m}^{-3} {\kept} at 30^{\circ} {\C}. When the temperature of the liquid is raised to 40^{\circ} {\C}, the metal piece weighs 27 {\g}. The density of liquid at 40^{\circ} {\C} is 1.25 \times 10^3 {\kg}- {\m}^{-3}. The coefficient of linear expansion of metal is

Correct Answer is : 2.6×10−3∕∘C

1.3 \times 10^{-3} \/{ }^{\circ} {\C}

5.2 \times 10^{-3} \/{ }^{\circ} {\C}

2.6 \times 10^{-3} \/{ }^{\circ} {\C}

0.26 \times 10^{-3} \/{ }^{\circ} {\C}

EAMCET Engineering 2009 Solved Paper

Section: Physics

Question : 13 of 160

Marks: +1, -0

A piece of metal weighs 45g in air and 25g in a liquid of density 1.5×103‌kg−m−3‌kept at 30∘C. When the temperature of the liquid is raised to 40∘C, the metal piece weighs 27g. The density of liquid at 40∘C is 1.25×103‌kg−m−3. The coefficient of linear expansion of metal is

1.3×10−3∕‌∘C
5.2×10−3∕‌∘C
2.6×10−3∕‌∘C
0.26×10−3∕‌∘C

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