As you walk along a road, you spot a supersonic jet flying towards you by looking...
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As you walk along a road, you spot a supersonic jet flying towards you by looking up at an a = 45° angle (see the figure). The plane is coming towards you and you keep looking at it as it passes over your head. This jet model is known to have a cruise speed of Mach 2. At your current altitude, which is very close to sea level, the ambient temperature is 15°C and the ambient temperature at the jet's altitude is around 1°C. The air can be considered as an ideal gas with constant specific heats. (1) At what angle B will you be looking at (with respect to the vertical line, see the figure) when you first hear the jet? The average temperature can be used to consider the propagation of sound induced by the jet. (2) Taking into account the variation of the speed of sound with temperature, draw qualitatively how the Mach cone around the aircraft would look like. M=2 1 deg. C a=45° B=? 15 deg. C Figure 2: Sketch for Problem 8 Activate Windov As you walk along a road, you spot a supersonic jet flying towards you by looking up at an a = 45° angle (see the figure). The plane is coming towards you and you keep looking at it as it passes over your head. This jet model is known to have a cruise speed of Mach 2. At your current altitude, which is very close to sea level, the ambient temperature is 15°C and the ambient temperature at the jet's altitude is around 1°C. The air can be considered as an ideal gas with constant specific heats. (1) At what angle B will you be looking at (with respect to the vertical line, see the figure) when you first hear the jet? The average temperature can be used to consider the propagation of sound induced by the jet. (2) Taking into account the variation of the speed of sound with temperature, draw qualitatively how the Mach cone around the aircraft would look like. M=2 1 deg. C a=45° B=? 15 deg. C Figure 2: Sketch for Problem 8 Activate Windov
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