Contraction joints are used between big slabs of concrete or asphalt during road construction. These joints prevent roads from cracking during large changes in temperature. Physical properties of some common materials are given in the table.%0D%0A%0D%0A %0D%0A%0D%0AMaterial%09%0D%0AMelting Point%0D%0A%0D%0A(° Celsius)%0D%0A%0D%0AThermal Coefficient*%0D%0A%0D%0A(10 Superscript negative 6 Baseline per ° Celsius at 20 ° Celsius)%0D%0A%0D%0ADensity%0D%0A%0D%0A(grams per centimeter cubed)%0D%0A%0D%0Aaluminum%09660%0923%092.70%0D%0Airon%091538%0911%097.87%0D%0Arubber%09128%0977%090.92%0D%0Asilicon%091410%093%090.97%0D%0A %0D%0A*The thermal coefficient represents the increase in volume of the material when the temperature increases by one degree.%0D%0A%0D%0AQuestion%0D%0ABased on the data, which material is ,begin emphasis,most,end emphasis, likely to be used as a contraction joint?%0D%0A%0D%0AAnswer options with 4 options%0D%0AA.%09%0D%0Aaluminum%0D%0A%0D%0AB.%09%0D%0Airon%0D%0A%0D%0AC.%09%0D%0Arubber%0D%0A%0D%0AD.%09%0D%0Asilicon
Based on the data, the material that is most likely to be used as a contraction joint is B. iron. This is because iron has a low thermal coefficient of 11 and a high melting point of 1538°C, indicating it can withstand large temperature changes without cracking.
