Rekha went to her grandfather’s village for vacation. She saw bullock cart got struck in wet mud and the driver was not able to push it out by himself. Rekha ran to his help and together they pushed it out, but the iron rim of the wheel came out. They tried to put it on the wheel but it was smaller than the diameter of wheel. Suddenly she collected some wood and set them on fire and heated the rim and it slipped on the wheel.
(i) What nature is shown by Rekha ?
(ii) (ii) Name the property of solid used here ?

Explanation

**Step-by-Step Solution:**

(i) The nature shown by Rekha can be described as kind and helpful. She demonstrated a willingness to assist the bullock cart driver in a difficult situation, showcasing her helpfulness. Additionally, she exhibited presence of mind by using her knowledge of physical properties to solve the problem effectively.

(ii) The property of solid that is used in this scenario is the thermal expansion of solids. When Rekha heated the iron rim, it expanded due to the increase in temperature. This expansion allowed the rim to increase in diameter, enabling it to fit back onto the wheel.

The relationship governing the thermal expansion of solids is given by the formula:
\[ \Delta L = L_0 \alpha \Delta T \]
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