Question

4.
A piece of metal weighs 45 g in air and 25 g in a
liquid of density 1.5 ×10^3 kg/m3 at 30°C. When
the temperature of liquid is raised to 40°C, the
metal piece weighs 27 g. The density of liquid at
40°C is 1.25 ×10^3 kg/m3. The coefficient of linear
expansion of metal is
(1) 1.3 ×10^-3/°C (2) 2.6 × 10^-3/°C
(3) 3.9x. 10^-3/°C (4) 5.2 x 10^-3/°C​

Answer 1

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(2) 2.6 × 10^-3/°C

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