Gas Dynamics (Compressible Flow) Normal Shock Wave

[enginsale]

Homework Statement

Suppose that a blast wave, which might have been initiated by an atomic bomb explosion, is traveling through air at standard atmospheric conditions with a speed of 60,000 m/s
find change in ( pressure , temperature , stagnation pressure , velocity ) produced by the wave with respect to an observer who is stationary with respect to the undisturbed air.

Homework Equations

v= M*sqrt(gamma*R*T)

isentropic tables & Normal Shock Wave Tables.

The Attempt at a Solution

i'm trying to use the equation v=M sqrt(gamma*R*T) with air p=103.5 kpa , T=298K , but i can't seem to understand the problem , since i get M=180 which is obviously wrong.

 

[SteamKing]

The shock wave is traveling at 60000 m/s, and the speed of sound is approx. 340 m/s.
M = 180 is about right.