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A bar of iron is 10 cmat 20'C.At 19'C it will be (alpha Fe=1110-6/^°C) 1) 1110-6 cm longer 2)1110-6 cm shorter 3)1110-5 cm shorter 4)1110-5 cm longer |
| Answer» A bar of iron is 10 cmat 20'C.At 19'C it will be (alpha Fe=1110-6/^°C) 1) 1110-6 cm longer 2)1110-6 cm shorter 3)1110-5 cm shorter 4)1110-5 cm longer | |