Shock Definition and 221 Threads

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