Heating an object causes it to expand. The length of the square will increase equally along the x and y directions. Thus, its shape does not change.
A square is cut out of a copper sheet. The square is heated uniformly. As a result it turns into
a) a square with larger area
b) a square with smaller area
c) a rectangle with larger area
d) a rectangle with smaller area
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What scientific concept do you need to know in order to solve this problem?
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