Physics > 2008 > 19
WASSCE
A metal rod of length 50cm is heated from 40°C to 80°C. If the linear expansivity of the material is α, calculate the increase in length of the rod (in metres) in terms of α.
A.
20 α
B.
200 α
C.
2000 α
D.
20000 α
Answer: A
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