Physics
Grade-9
Easy
Question
The coefficient of thermal expansion of metals is usually _____ the non-metals.
- Greater than
- Smaller than
- Equal to
- Any of the above
Hint:
- A nonmetal is an element that is generally a poor conductor of heat and electricity
The correct answer is: Greater than
- Thermal expansion is the tendency of matter to change its area, volume and density by changing its shape, which is in response to the change in temperature. The change occurs due to the fractional change in the linear dimension , length of the object. There are a large number of metals, ranging from no change due to temperature differences to large change due to temperature differences.
- A nonmetal is an element that is generally a poor conductor of heat and electricity
- The coefficient of thermal expansion of metals is usually Higher the non-metals.
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