3. A bar of iron is 10 cm at 20°C. At 19°C it will be (aFe = 11 * 10-6/°C)
(1) 11 * 10-6 cm longer
(2) 11 x 10-6 cm shorter
(3) 11 * 10-5 cm shorter
(4) 11 x 10-5 cm longer
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3. A bar of iron is 10 cm at 20°C. At 19°C it will be (aFe = 11 * 10-6/°C)
(1) 11 * 10-6 cm longer
(2) 11 x 10-6 cm shorter
(3) 11 * 10-5 cm shorter
(4) 11 x 10-5 cm longer
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