Shock Definition and 238 Threads

Hello, the question I have to answer is above in the Title...I thought that the V shape of the shock wave gets wider the faster you are going. No? Thanks Zach

HI, I couldn't decide which forum was the best to post these in. I have two questions regarding electricity and getting shocked, or electrocuted. 1. Being shocked from the spark plug leads on either small engines (lawnmowers) or cars. Classically, on either of these, you have a coil which...

When a star explodes, does the shock wave move faster than the local speed of light? If it does, what effects would this have? A little explaining is in order... While the actual speed of light does not change (c in a vacuum) the overall progression of light is greatly slowed down due to...

Can someone explain to me the physics involved in this? Why does the dampener absorb some of the shock? Where does that shock go? This sort of stuff... Please do explain Thanks in Advance

Is there a cheap way to measure static correction on a shock collar for dogs? Thanks in advance, Mac

Hi everybody ! I have used FLUENT to do the following simulation ( it's 1.5 cm, not 1,5) http://upload.tinhco.net/thoai/debai.jpg I set 500 for "Number of Iterations". After running Fluent, I saw CL and Cd have convergenced, then I turn off the interation process. And here are my...

Hello everyone! This might be bit of the 'electrical engineering' topic - but maybe someone out there can help :) Does anybody have any idea of what the maximum frequency of a piston in a shock absorber of a forumula 1 car is? What do i mean: How many times does the piston (in a shock...

I just had an electric shock, not a lethal one, it just burnt one finger a bit, but now i have a tooth that is going tick tick all the time, it is annoying and is hard to ignore. Any one have an idea why??

Why is it that when you put your two finger on the opposite terminals of a 1.5 V battery, you don't get an electric shock? (Or maybe you do, but you just don't feel it?). I am guessing that this is because our body has a high resistance, is that correct?

I am looking for a material to use, namely Silicon Carbide, and it gives a "Thermal Shock Paramter - 167C" Obviously thermal shock is going to be failure when there is a rapid temperature change, but what does 167C mean? It's not a rate of cooling, just a temperature. I can't find anything on...

I am designing a piece of test equipment that will be mounted onto a small rocket for meteorological testing. The people running the rocket side have mandated a series of tests that all test equipment must pass before being fitted. One set of tests are pretty severe shock tests...

I heard recently that Wheat (grain) production decreased due to drought in Australia and other areas, e.g. midwest US. Several countries have curtailed or reduced export and in some cases are now importing. At the same time, the cost of production has increased, in part due to increased energy...

I have developed new tables for moving shock and I wonder if any one has seen these kind of tables? These tables appears in book "fundamentals of compressible flow mechanics". The book and software can be download from www.potto.org. If you seen these table please drop me a...

Hi, is it possible to shock someone by forcing them to hold a spark plug in one hand and a piece of metal connected to an electric current in the other to cause like, let's say 3V of electricity to go through their body? Or is there something wrong with the setup?

Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the Earth's crust, the P-waves travel at around 6.5 km/s while the S-waves move at about 3.5 km/s. The actual speeds vary depending on...

Ok, I watched a TV show where they showed a test of a building designed to handle an attack like the OKC incident. There was a visible overpressure wave on the high-speed film that hit the building and cracked the glass and knocked a couple pieces of sheetrock loose (the building otherwise...

Okay, I got this worksheet today and my teacher didn't explain to me what shock cones were. So here's the problems, and what I did so far to work them out. "An aircraft makes a supersonic pass 382 m over an observer. the shock wave pounds the observer after the plane is 405 m past her...

My teacher gave us a worksheet to prepare for the test tomorrow, and we never discussed anything about problems 10 to 14. I'm not asking for answers . . . just clarifications. 1.) What is a shock cone, anyway? 2.) What does Mach II, Mach III, etc. mean? 3.) Are there certain equations that...

While visiting her sister, Tsu saw our nephew who is currently in the Navy and who just returned from Singapore. He had an alcoholic beverage with a snake coiled up in the bottom of the bottle! For some strange reason, Tsu chose not to indulge. :biggrin: I did a little googling...

Every time I get out of my truck and touch the door to shut it, I get a zinger of a static electric shock. It's getting very annoying. I'm suspect I'm charging myself by rubbing against the seat cover as I get out. Anyone have any ideas how to stop this?

What is the shock wave cone half-angle for a supersonic airplane flying at Mach 2.30? Would you use Mach=1/sin(theta) and then divide by 2 to get the half angle? So 2.30=1/sin(theta)=12.9 degrees

Is the frequency of the shock waves detected by the observer infinte? And, as I know, a shock wave can be produced even if the source didn't emit sound waves. When a object moving in a medium at a speed faster than the speed of medium's elastic wave's speed. In this case how we calculate the...

Gravity shock wave... Hi. What if there is gravity shock waves in the univers. I asked a professor once and he said that they can't exist becouse it need infinit energy to create a gravity shock wave. But what if they were created in the big bang so we have gravity shock waves now in the...

Does anybody has information about bow shock waves?

I was just wondering if there are shock absorbers on the market that will allow motion in one direction freely, but resist motion in the opposite direction; thanks.

here's a problem that I am currently working on. I know the theory, but I'm not quite sure how to start this particular problem: "Thomas was crawling around on the rug. When he reached for a metal truck, a prominent spark lasting 5mmsec appeared between his fingertip and the object. His...

I would like to ask that what character does shock wave (not pressure wave ) play in the forming of a star from the interstellar cloud?

I found this amusing: I just read the Wikipedia article on the recent quake/tsunami, which mentions that the earthquake may have sped up Earth's rotation, shortening days by 3 microseconds... but balanced that by noting that the moon slows days by 15 microseconds each year. It also mentions that...

can anyone explain the shock absorbing ability of steel? thank you

Forgive me for the long post, but I'm in some desperate need of clarity on this matter. I just can't seem to grasp the whole shock wave concept, or at least the meaty part of it . I only have a couple of problems left to do to finish my HW I'm at an impasse until I dispel my confusion. I...

Im not sure if this is the right forum for this question as I am unsure where it fits. I always think of a Shock Wave as something that travels through a medium, as in a sonic boom from an aircraft, but some talk of shock waves in space, as in the shock wave from a supernova, is this the...

You are designing a type of shock absorber that protects delicate objects from jolts during transportation. To test your prototypes, to decided to find the maximum height from which a crytal vase wrapped in your absorber can be safely dropped. You get a step ladder with 40 steps and decide to...

Ok, imagine this experiment: I am in Mars, inside of a supersonic storm. There is a small sphere standing inside the incident flow, and I am in a laboratory viewing the shock wave caused by the sphere. I have some pressure measurements of the flow, (i.e around of the sphere surfice), so I can...

If a very large amount of power was grounded say in house and all the taps for example were connected to the same circuit would somebody touching a tap get any sort of eletric shock. I have heard that some peoples TVs etc explode when their house gets hit by lightning even though they have...

Can anyone in this section help me answer this question? Any help would be appreciated. Terry Giblin

Shock waves propagating in photonic crystals can be used to lower or raise the frequency of light passing through them. It seems (to me) to be some kind of Doppler effect at work here. The electrons in the atoms of the crystal absorb the light, and as they move because of the propagating...

I read in an old metal working book that when a auto body panel is struck sharply with a hammer that for a microsecond or nanosecond there is a vibration or "shock waves" that allows the grains of metal to slip past one another and re-arrange slight. I am desperately looking for an explanation...

Shock and Awe tactics, huh? Gosh, they certainly love the slogans over there. What that means in non-sloganeering English is: we've flattened half of Baghdad to "liberate" them. See the book if you wish. http://www.dodccrp.org/shockIndex.html