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Two iron rods – one 10 m long and the other 5 m long, are heated to the same rise in temperature. Which will expand more?
Two identical rods of copper are heated to different temperatures — one by 5°C and the other by 10°C. Which rod will expand more?
One rod of copper and another identical rod of iron are heated to the same rise in temperature. Which rod will expand more? Give reason.
In the ball and ring experiment, if the ball after heating is left to cool on the ring for sometime, the ball again passes through the ring. Explain the reason.
Describe an experiment to show that same volume of different liquids heated to same rise in temperature expand by different amounts.
Complete the following sentence:
When ice melts its volume ______ and density _______.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
Analogy:
Ordinary glass:: Glass tumbler.
Pyrex glass:: ______.
