# Questions tagged [shock-waves]

A shock wave is the final stage of a nonlinearly steepening wave that has reached a balance between steepening and energy dissipation resulting in a discontinuity.

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### Can supersonic flow be achieved without converging diverging nozzle?

Can supersonic flow be achieved without the presence of a converging diverging nozzle if sufficient pressure difference is available? https://www.tomshardware.com/desktops/pc-building/an-ordinary-...
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### Deflecting a lunar mass with consecutive nuclear explosions [closed]

I'm looking for help in determining the amount of deflection an object with a mass of roughly $7\times10^{22} \,\text{kg}$ (a lunar mass) needs from colliding with a planet. Let's stipulate that the ...
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### Can the dynamic between high speed sound media and slow one preduce shock wave?

Suppose there is two long media that in one of them the speed of sound is high and in one of them is slow. Would the vibration in the one with the higher speed of sound would cause shock wave in the ...
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### Clapping-like sound from large planar object hitting a surface

I am trying to understand the behavior of air when a large, planar object hits a parallel surface at a high velocity, thus forcing the initially static air outwards, and creating a sound wave. This is ...
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### Utility of Burger's equation in the study of shock waves

Consider the viscous Burger's equation, $$\frac{\partial u}{\partial t}+u \frac{\partial u}{\partial x}-\nu \frac{\partial^{2} u}{\partial x^{2}}=0, \tag{1}$$ with $\nu>0$ the kinematic viscosity....
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### Are seismic waves and shock waves same?

Are shock waves (those produced by high speed jets) and seismic waves (produced during earthquake) the same? In many places I have seen seismic waves referred to as shock waves. So are these two same?
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### How would high-explosives interact with the shockwaves around a hypersonic weapon?

This is a proxy for a question from a friend. I'm an aerospace engineer so I have some domain-knowledge on compressible flow but less about missile design and even less about explosives. I also ...
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### Gravitational waves manifestation of 'physical' spacetime?

When a stone is thrown in water, water waves are created. The stone imparts its kinetic energy to water. Likewise a sound speaker imparts its kinetic energy to air molecules. When an electron falls ...
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### Shockwaves in a colllision of two cylinders

On Motion Mountain's first volume (fall, flow and heat) by Christoph Schiller, page 128, the author asks the following puzzle: A surprising effect is used in home tools such as hammer drills. We ...
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### Is submersion in a canal a good way to shelter from a nuclear strike?

I live 1.5 miles from the center of a city in a nuclear-armed country, and an adversarial country has just put its nuclear forces on high alert during a time of extraordinary geopolitical tension. I ...
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### Theoretical rocket engine based on plasma shock waves particle acceleration

Credits for the article - https://www.quantamagazine.org/cosmic-map-of-ultrahigh-energy-particles-points-to-long-hidden-treasures-20210427 Can this mechanism be used to speed up gas particles to ...
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