A bimetallic strip is made up of aluminium and copper. When heated it bends towards copper. Which metal expands more when the two are heated to the same temperature?
a. Aluminium expands more than copper.
b. Copper expands more than aluminium.
c. Both aluminium and copper expand by the same amount.
d. Neither aluminium nor copper expands.
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sorry to say but i don't know
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