I would say the correct answer would be light travels faster in medium 3 then medium 2.
The work performed on an object is the force multiplied by the distance it is moved, provided the movement is parallel to the force. Since that is the case here, we can get the work by W=Fd=1900N x 0.23m = 437J. This energy is used to split the wood.
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This was my best estimation of the answers
Answer:
A. become flat becuase the volume decreases when the temperature decreases
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