Changes Around Us - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Long Q&A:
Q1: How is metal rim fixed on a wooden wheel of a cart? How is the changes made in that metal?
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Ans:
Metal rim is made slightly smaller than the wooden wheel. On heating rim expands and fits into wheel. Cold water is then poured over rim, which contracts and fits tightly onto the wheel.
Q2: 2. How the iron blade is fixed into a wooden handle in tools used to dig the soil?
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Ans:
Iron blade of tools has a ring in which the wooden handle is fixed. Normally the ring is slightly smaller in size than wooden handle. To fix handle ring is heated and it expands. Now handle easily fits into the ring. When ring cools down it contracts and fits into handle.
