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Two straight strips of metal alloys, invar and bronze, are bonded together at room temperature. Bronze expands appreciably when heated but invar expands

very little. D escribe the shape of strips when heated in an oven.



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The strips will expand in all three dimensions.  See the diagram for the side view of the strips.

the area of the strip will also increase, if seen from the top. 

the expansion also depends on the type of bonding between the two..  If they are welded together, then the shape may not be smooth near the joint.
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