Supersonic Definition and 78 Threads

Why do supersonic waves (when the source is faster than the wave) create sonic booms? I understand that when a source breaks the sound barrier and travels at the speed of its waves, the waves just build up at the front of the source and create a condensed sound of multiply sound waves added...

Homework Statement Dr.Botha sees a supersonic plane flying horizontally in a straight line, directly overhead. If the plane is flying at a height of 500m above the ground, and Dr.Botha hears a sonic boom 1.00s after the plane flies over him, where is the plane at the instant he hears the boom...

Oki well ill start with a little background so you know just about me :) I am studying aero engineering in Sydney Uni and second year student so i haven't really hit all the Flight Mechanics and aerodynamics yet that comes next year but i was talking in a laboratory with a 4th year student (we...

Homework Statement suppose we have a water reservoir with some pressure in it and a small hole through which the water exits. on the other side, there is just atmosphere. by increasing pressure on the "water side", the velocity of exiting water increases. what happens when pressure is large...

http://www.popsci.com/military-aviation-amp-space/article/2009-03/hurricane-busters

A car-sized device is running along a light-traffic highway at slightly above the speed of sound. It is unmanned and equipped with powerful RCS and flaps to make the tight turns around other cars and road curves, thus following the road. The jet engine is tilted slightly upwards and points...

Hi Can anyone explain in detail about drag increase in supersonic speed Why and how drag increases in Blunt shape nose cone to compare with Sharp nose cone at supersonic speed? Ryan

Homework Statement A supersonic jet traveling at Mach 3.00 at an altitude of 20,000 meters is directly over a person at a time t=0 as show in figure (see below). (a) At what time will the person encounter the the shock wave? (b) Where will the plane be when the "boom" is finally heard? (Assume...

Consider a situation where you are standing still (with your feet chained to the floor) experiencing a horizontal windspeed of >340 m/s. Despite the fact that you are stationary relative to the earth, are you in fact supersonic since you are moving faster than the speed of sound relative to the...

Hi all, I am working on aerodyanmics homework, and I've been stuck on this problem for a while. "The shockwaves on a vehicle in supersonic flight cause a component of drag called supersonic wave drag Dw. Defined the wave-drag coefficient as Cdw = Dw/(qS), where S is a suitable reference...

Homework Statement According to geologists, the water in a waterfall was supersonic, that is, it fell with speeds in excess of the speed of sound. Ignoring air resistance, what is the minimum height necessary to create a supersonic waterfall? (The speed of sound may be taken to be 340...

Hey, I am trying to calculate the drag force on netting at supersonic speeds. currently I have been using the equation: F = 1/2 (ρ V² Cd A) I am having trouble applying it to netting due to the drag coefficiant, since i cannot find one for netting. Also all the examples I have seen for...

Defining the period measured by a moving observer relative to a stationary source as T=t(n)-t(n-1) where t(n) and t(n-1) represent the times when two successive wavecrests are received respectively, the theory of the Doppler Effect leads zero and negative periods in the case of sonic and...

When we take the turn in a car at a high speed, the turning radius is pretty big. Similarly, at supersonic speeds, the turning radius of aircrafts would be huge. Could anyone tell me the turning radius of aircrafts as such speeds and the minimum turning radius of any aircraft...

Subsonic-Supersonic... Supersonic--? Hi all, I was just wondering.. in the case of the Laval nozzle you go from subsonic to supersonic. But once your flow is already supersonic is there any sense in having a physical nozzle (as surely there is still some divergence to the exhaust) or would...

When you push one end of a pole the other end reacts (starts moving to) after the amount of time that it would take sound to travel to that side. So what happens when one end is pushed faster than the speed of sound? Thanks.

If an air plane flies much faster than a speed of sound can humans still hear it.

http://www.asminternational.org/Content/NavigationMenu/News/HeadlineNews/HeadlineNewsArticle.htm?SMContentIndex=6&SMContentSet=0 Associated Press May 8, 2006

Teachers Question: Why are the air bases of super sonic jets usually located far away from cities? Your response should discuss wave properties. I don't know what to answer. I have searched everywhere for it. Please help me!

I want to design a very small supersonic diffuser to be used in a pneumatic valve. Can anyone provide some help? thanks.

How can we apply the doppler effect when the source of sound is coming towards us at supersonic speeds?Is there a mathematical method for it?

For those interested in a remarkable aircraft - Lockheed's A-12, YF-12A, SR-71 Blackbird. http://www.sr-71.org http://www.sr-71.org/blackbird/index.htm at sr-71.org http://www.wvi.com/~sr71webmaster/sr-71~1.htm http://www.fas.org/irp/program/collect/sr-71.htm...

I really have no idea what category this type of question goes in. I'm actually a senior in high school but I think this may be a college level question because I'm in the highest level physics class my school offers and the teacher doesn't know how to do it. I saw it on a UIL test for science...

I have a question I am pondering about. If there was a wind and the windspeed is faster than the speed of sound, would there be any kind of sonic boom effect created?

Could someone try to explain to me the reason for the sonic boom that occurs during sonic flight and also the condensed water(?) coner(?) that appears behind the plane. I've tried looking it up but I couldn't find any good explanations...

Is it possible?. I just know it is possible in liquids and gases, but what would be the (structural) effect of a supersonic wave in a solid?. And how can we generate it?

Ok. Let's suppose the next imaginary experiment. I encouragely promise that I don't know anything about nowadays supersonic combustion problems. I want to continue with the discussion spread in the "rocket thrust" thread, and what Enigma and Russ Waters said. There is a supersonic flow at the...

Wow, last flight of the Concord was today. Sad sight seeing it. I am not sure but I hope there is some replacement in the works but I am not sure. Did they decommision them because of their age or lack of market?