Question : Among the following, in which material is the speed of sound is highest? (at 25°C)
Option 1: Nickel
Option 2: Steel
Option 3: Iron
Option 4: Aluminium
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Correct Answer: Aluminium
Solution : The correct option is Aluminium .
Aluminium typically has the highest speed of sound. Aluminium is known for its relatively low density and high elasticity compared to the other materials listed. The approximate speed of sound in aluminium at room temperature is about 6420 metres per second (m/s). In comparison, the speed of sound in iron, steel and nickel is lower than in aluminium due to their differences in density and elasticity.
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