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Determine the difference in the speed of sound in hydrogen at 0 degrees Celsius and in air at 30 degrees Celsius. Also indicate if is it faster or slower

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The speed of sound at different temperatures may be calculated through the following equation,
                                v = 331  + 0.6T
where v is the speed and T is the temperature in °C.
Substituting the known values,
                  0°C :     v = 331 + (0.6)(0) = 331 m/s
                  30°C:    v = 331 + (0.6)(30) = 349 m/s
Thus, the higher the temperature, the greater is the speed of sound. 

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