For 10 points, identify this quantity, a velocity that when exceeded can give rise to a sonic boom.
The UNESCO algorithm of Chen and Millero allows one to determine an equation for this quantity in seawater and improved over another equation relating this quantity as a polynomial of depth and temperature by Mackenzie. The differentiation of the equation of state for a relativistic fluid with respect to rest energy under constant entropy can be used to determine the square of this quantity as per the relativistic Euler equations. One method for measuring this quantity involves measuring the distances between small concentrations of powder along inside of a long, (*) resonant, metal tube and this method is named for Kundt. This quantity in fluids is generally is equal to the square root of the bulk modulus times the fluid's density. It is roughly 343 meters per second at room temperature. For 10 points, identify this quantity, a velocity that when exceeded can give rise to a sonic boom.
The UNESCO algorithm of Chen and Millero allows one to determine an equation for this quantity in seawater and improved over another equation relating this quantity as a polynomial of depth and temperature by Mackenzie.
speed of sound or Mach 1