Task: Text Categorization
Input (English): For an ideal gas, this quantity equals the square root of the adiabatic index times the gas constant times temperature over molar mass, a result which can be derived from a more general formula equating it to the square root of the bulk modulus over the density. For air, this quantity varies based on humidity and temperature. An object (*) exceeding this quantity will cause the formation of a cone of condensation due to the formation of a shock wave, which is also accompanied by a loud boom. For 10 points, identify this speed equal to Mach one, the rate at which phenomena such as thunder and voices propagate through a medium.
Output (English): Science