Safety Definition and 287 Threads

Hi I need help with a question in a Fire Safety course I'm studying for. The question reads : Define the following terms and indicate the units in which they are normally expressed. State how low numerical values for these properties would affect the ease with which solid materials can...

(here's more on SISSA if you want) Here's Percacci's page: http://people.sissa.it/~percacci/ Here's a sample: ==exerpt== ASYMPTOTIC SAFETY A quantum field theory that is perturbatively renormalizable and asymptotically free can be regarded as a fundamental theory, because it makes sense up to...

Asymptotic Safety (to nonperturbatively renormalize gravity) the idea is to get a predictive theory, where you only have to specify the values of a finite number of physically meaningful parameters---experimentally determined--and from there on your theory predicts stuff. and it is NOT based...

I watched a home video about the Tesla coil and saw the electric bolts...i thought the guy was standing kinda close to this thing but never got struck. Is there a limit to how far away the bolts of electricity can go from the coil? They looked pretty random.

Hi all, I have a question. In fast reactors, it is generally considered unsafe to have too high an amount of americium (mainly am-241) in the core, because it diminishes all the safety parameters of the core: - it has too high an absorption cross section, so that it "shadows" the U-238...

Homework Statement While walking on ice,one should take small steps to avoid slipping.Because the smaller step ensures (i)larger friction (ii)smaller friction (iii)larger normal force (iv)smaller normal force Homework Equations The Attempt at a Solution I have the following...

Hi there, I am the administrator for an airsoft group based out of the Chicagoland area. Many of our members currently use mesh safety goggles of the sort used in arboriculture, wood chipping, and concrete cutting. These goggles do not have a specific impact rating (though the manufacturer...

Don't take one from this guy. This link has been around for a while, but this may be a good time for a refresher view.

I can't solve this problem, can u ? We have this crane hook which has a force F=3000dN pulling it down and we have to calculate a few designing elements look to the section and calculate the safety factors for: 1. the crane hook (part No. 5 )at the section A-A and B-B . 2. the hook trunion...

Homework Statement Hi. I am a product designer and I'm looking for a way to solve the following: I have a toy bin (see jpeg) which currently does not pass a child safety test as it tips over under certain conditions and I need to change the dimensions so that it will pass this test...

"public safety in vicinty of electrical instillation" help me..! hello ,,, i am Abdullah from saudi arabia i am engineering student in ksu university i need some help in my presintation supject and now i want three diffrent idea to talking apout " public safety in vicinty of...

I need to runs this by some others to make sure it checks out. The guy that runs bugsweeps.com claims that microwaved food is dangerous. He claims that the water molecules in the food keep oscillating at 2450 MHz after the food is removed from the oven and this is somehow dangerous to us. So...

I have a class III laser that I'm doing experiments with. The laser makes a point on a wall. I am staring at this point for extended periods of time. I could potentially star at this point for upwards of 10 minutes at very close range(less than 12 inches). I can't really discern weather or...

I want to recommend the following paper to anyone who wants the spec up on Renormalization Group flows, fixed points, or asymptotic safety. The author is interested in reviving the functinal integral approach to QG, which was aboandoned when 't Hooft and Veltzman showed GR was nonrenomalizable...

Okay, maybe not great marks for technical merit, but high marks for style and definitely very high marks for dedication. What a trooper! http://www.thesmokinggun.com/archive/0411061foot1.html (Click the picture for the video)

Oops! http://en.wikinews.org/wiki/Airbus_A380_safety_test_injures_33 March 27, 2006 I have found this story at the Orlando Sentinel - hopefully they got it from a reliable source - http://blogs.orlandosentinel.com/business_tourism_aviation/2006/03/a380_drill_lead.html

I know that in order to be helped we must present our thinking, but I cannot do that since my knowledge in this topic is small and I don't have time to make a search because I have to study for my math's test that is tomorrow. I hope you understand. Imagine that you are going to visit a...

http://techrepublic.com.com/2100-1009-5911676.html" The new http://edocket.access.gpo.gov/2005/05-20606.htm".

I need some help. My internet/cable went out yesterday so I went outside to look at some of the wiring and noticed that some of the wires were melting off. I thought it might be because of the crazy heat that we have been having lateley so I called my provider to come check everything out for...

A question to people coupling lasers to optical fibers. What is the power and exposure time of laser beam directed in the eye which is considered dangerous? The ones I´m currently working with are 15 mW. Are there any ways to couple laser beam to a fiber without having to look into another end...

I was at work today, and this guy named harold who is pretty smart was discussing the safety of CO2 with his coworker. We fill CO2 tanks like those used for grilling (I think)..anyway, he said that unlike compressed air, you cannot get hurt by CO2 rushing out of a broken valve. He said that...

MIT Center for Advanced Nuclear Energy Systems (CANES) Courses for Professionals Nuclear Plant Safety: 20-24 June 2005 http://web.mit.edu/canes/education/plantsafety.html and Materials Reliability in Nuclear Power Systems: 27 June - 1 July 2005...

Hi all, I have an application where I'm going to need to be using Ferric Chloride ( http://www.sciencestuff.com/msds/C1731.html ). Unfortunately, the guy who told me what I needed to use is now out of town, and out of communication so I'm not able to ask him what a reasonable level of...

Hi guys this is my first post and I need some help with this car saftey project I'm doing in my physics class. I was wondering, hypothetically speaking, if my car design had sensors all around the car that calculated force on impact and it sent it to a computer chip located in the seatbelt...

In another post, someone was asking about black lights.. Are they really emitting UV? Is it enough to be dangerous? In theory I mean. Obviously (scratch that, I mean: 'one would assume') they wouldn't market them if they were actually dangerous when used properly. My son lights his room...

should we keep sending machines to other planets to discover, or .. should we send men? after all, machines have been failing

1.Explain briefly the difference between direct and indirect contact with electrical equipment.

Sir Iam in great need of this answer 1.An automotive battery currently operates at a nominal 12 V d.c.This voltage level is normally considered inherently safe.Explain why the automotive battery still represents a safety hazard.(at least 100 words).

Elevator problem with safety rails, spring, and a snapping cable---> The cable of an 1800 kg elevator snaps while it is 3.7 meters above a spring with constant of k = 0.15 MN/m. Also, a safety guide rail device provides a 4.4 kN frictional force against the fall for the duration of the fall...

They're coming to termite tent my apt. building Wednesday A.M. What the heck are those chemicals they use for this anyway? Anyone know? I think they will finish Thurs. afternoon and I'll be able start airing out the place Thursday night and move back in Friday evening. Anyone been through this...

An engineer claims to have a new kind of "safety" air-brake for elevators. If the cable should snap, a patented velocity-sensor turns on the brakes once the elevator hits 40 mph. The brakes are powerful enough to stop a 700 lb elevator in 1/20 of a second. How much force do the brakes exert...

my friend and i recently made a flame thrower that was posted on other forums. it has a tank made from pvc that we pressurize to 80psi, the tank connects to a hose, through a vacuum breaker, through more hose, to a gun made from 1.5in. metal pipe. the gun has a valve where you can open it to...

I am a freshman at USD ( chem major). I absolutely love chem lab. I have been think about preforming some experiments at home. Is this a bad idea, unsafe. I have had basic college lab knowldge, i.e. what to do if you spill an acid, ect. Is it safe to buy chemcials (an or labware)...

I got to write a term project about "physics in Cars" I am a little bit short on material to write about I know that spoilers are about aerodynamics in cars plus there is air friction I know momentum is ýnvolved ýn safety(airbag safetybelt) and crashing I know frýctýon of the tires in...

This idea just struck me. I think it might be one of those ideas which could be revolutionary, but at the same time, it could also just as equally be a stupid idea which everyone who knows what they are talking about can instantly see as a waste of time and money and completely...

http://www.nytimes.com/2003/09/08/national/08NUKE.html?pagewanted=print&position= September 8, 2003 Safety Problem at Nuclear Plants Is Cited By MATTHEW L. WALD ASHINGTON, Sept. 7 — The emergency cooling systems that are meant to protect nuclear reactors from melting down in case of a...

Hey there everyone I need to do a presentation that shows the danger of having loose objects in the car...using Newton's first law...i'm stuck for ideas, we have to make some experiment like an egg on a trolley or something...does anyone have any ideas? Steph