Break Definition and 281 Threads

Next Spring I'll be graduating at the University of Arkansas with a Double major in Math(B.S.) and Physics(B.A.). As of right now the plan is to teach high school math and/or physics in Texas. However, that isn't necessarily my ultimate goal. I would like to go to grad school and get at least a...

Hi Folks, We use a UV bulb in my workplace which contains deuterium gas. The bulb is safely contained within a housing unit inside a machine so there are no direct hazards with UV radiation etc. I was however wondering, what would happen should such a bulb break? I have checked some MSDS...

Why is Safety Injection used during Main Steam Line Break? All that I can find is that it brings water back to the cold leg to compensate for the loss during the break.

What do you guys usually do for spring break? I can't get myself to quit studying, but i don't know if that will be a bad thing in the long run. Do most people relax and catch up to their sleep, to get refreshed for the second half of the semester?

Hey guys, In a bit of a sticky situation here. So, there is a prof. who wants me to work with him over the summer and then into the future, the issue is, his area of research is NOT what I see myself doing or even interesting. My question is, how would you tell him that you would rather...

Hey there. I have an open loop transfer function TF = K/(t*s^2 + s) where K is known. Given a value for the break frequency (say, w_b = 10 rad/s), I have to determine the value of the time constant, t. I understand how do this with a bode plot, but not entirely sure how to proceed...

I'm trying to get a sense of how widely applicable Maxwell's equations really are. I've read that electrodynamics becomes non-linear in the Schwinger limit where electric field strengths get high enough, but are there other situations where Maxwell's equations are insufficiently accurate? What...

I want Enter to produce a line break, and shift+Enter to evaluate. Swapping the default commands. Is it this possible? Programming in maple is a pain if I have to press shift+enter every time.

Because of the "sea of electrons" holding a metal lattice together is it possible to charge that metal so much positively (by removing enough electrons) that it will break apart due to the unbalanced repulsion between positive nuclei? normally the interaction between the "sea of electrons" and...

How do water molecules behave in the presence of a static electric field? If I apply an electric field on water molecules, would they apply pressure to a solid surface (let's say a noble metal), and if so, what would happen? Could the oxygen wedge in between the atomic gaps on the surface of...

I don't know where to put this post, I am sorry if I put it into the wrong place. I was writing a proof on wave in conductor in blogger. But I discovered that blogger automatically break lines after a latex math. Here's my post...

Everything I've encountered in physics so far allows infinitesimal numbers to be manipulated as real numbers. But there has been much criticism towards Leibniz's notation, and I assume it is for a reason. When in mathematics will the infinitesimal notation not work? Including treating...

Ok I've been trying to figure out the difference between dropping something very heavy onto glass breaking the glass and throwing a penny at glass fast enough to cause it to shatter. specifically what I am trying to figure out is how does energy, and change in momentum relate to force...

I saw this in one of the episodes of Numb3rs - (a T.V. show that describes how math can be used to solve crimes) It basically said that if Riemann hypothesis is true then it could break all the internet security. I want to know how. I couldn't understand Riemann hypothesis from Wikipedia and...

I'm currently an electrical and computer engineering undergrad and I get 4 weeks off for winter break. Is it possible to get an internship (paid or unpaid), preferably in industry, for such a short period of time?

Hello! I'm new to the forums, have SOME physics under my belt as a civil engineering major. I have a hypothetical question to solve that has been driving me bonkers. At first, it sounded simple enough. Now, I must assume MANY things and don't know which set of equations to use to solve my...

Hello! I have another idea for how to break the second law of thermodynamics, and I don't see where this one cracks either. I would be glad if someone could explain this to me. Kelvin-Planck statement of the second law: "No process is possible whose sole result is the absorption of heat...

Hi! I have an idea for how to break the second law of thermodynamics, and I don't see where it cracks. I would really appreciate if someone could explain this to me. Kelvin-Planck statement of the second law: "No process is possible whose sole result is the absorption of heat from a reservoir...

Hello, I am having troubles ridding my research paper of this thorn in my side: It is a rather random line of dots. I have tried everything in my power to remove it, but to no avail. I am, for some odd reason, unable to highlight it. Furthermore, temporarily deleting the surrounding...

Homework Statement A capacitor is initially connected to a voltage source in series for a long time. At time t0 the make before break switch switches to another series circuit which includes the capacitor. This means that the capacitor will have an initial voltage v(0-) = voltage source...

Dear all, I just read something in a book by Lawrence Krauss which I don't understand. I hope you can answer my question: Kraus makes the argument that if you take quantum mechanics and gravity, something is more energetically favorable than nothing. Hence if you take nothing, at some point...

As the expansion of space accelerates, space is created and this seems to break the conservation of energy law. I've googled this but have not found a really good explanation of this. Imagine for a moment we're so far into the future that there are vast vast voids between what remains of...

she doesn't know the difference between astronomy and astrology.

Force need to break a magnetic lock NOT SOLVED So rest assured I'm not planning a prison break. I work in a secure treatment center for adolescents and the other night we had an escape. Many of the staff are amazed at the ease they busted the lock. I looked at it and there is a lot of play on...

This is a question someone asked me today and it's bugging me allot. If the acceleration caused by gravity is greater than the speed of light at a black hole event horizon then does this mean that the matter is falling at faster than light speed?

By Bell’s theorem, an interpretation of QM must break either locality or causality. Linked below is the only interpretation I know of that chooses to maintain locality. (I don't know many.) Do you know of any others? CAUSALLY SYMMETRIC BOHM MODEL...

Homework Statement Assume you have 6 white pine boards with all the same breaking force and there is no difference in the boards at all If you find the force to break one pine board, two pine boards with no gaps and three pine boards on top of each other with no gap. Does the amount of...

In the spinning cylinder room example mentioned in relativity, where the nearest distance between 2 point is actually curved line.. and light take a straight pass right, which is farer than the curved line due to time dilation in the middle of the room due to a smaller acceleration than side of...

Hi I have been doing taewkon do and seen people break boards and I want to know is it easier to break say 1 2 inch thick pine board or 2 1inch pine boards assuming that the boards are uniform and have no knots in them and that the 2 1 inch boards are on top of each other with no gap...

Homework Statement A customer is choosing between two cellular phone plans. One plan has a monthly fee of $50 for an allowance of 500 minutes per month. If the customer uses more than 500 minutes, the charge is $0.35 per additional minute used. The other plan has a monthly fee of...

Hi, I installed XAMPP into my F drive folder called: "Program files". I got a warning: "WARNING: Your install directory contains spaces. This may break programs/scripts" The program is running so no need for help. But was wondering how is it that spaces in installation category names can...

Homework Statement I need to get E_{b} = .5(m*n*V^{2}_{i})/(m+n) [eq 6] where E_{b} is the energy required to break the board, m is the mass of the object hitting the boards, n is the mass of the board and V_{i} is the velocity of the object before hitting the board. Homework Equations...

Hi, I am curious, would stopping a car more quickly, or more abruptly, allow its break pads to last even a little longer? I understand that stopping short may have adverse effects on other parts of the breaking system or on the car or person riding it. I do not intend to stop short in an...

Description: This course covers stellar astrophysics, solar physics, star formation, stellar evolution, processes in the interstellar medium, galactic dynamics and evolution, formation of galaxies and cosmology. Book: INTRO TO MODERN ASTROPHYSICS- Carrol What should I review over break...

Homework Statement The figure below shows the essential parts of a hydraulic brake system. The area of the piston in the master cylinder is 1.8 cm2, and that of the piston in the brake cylinder is 6.4 cm2. The coefficient of friction between shoe and wheel drum is 0.50. If the wheel has a...

Homework Statement the egg of mass 59g breaks from a height of approximately 0.35m and breaks How much force does it take for the egg to break We know the egg broke at exactly 0.35m and any height less then that it was not as effectively broken? Homework Equations eg = mgh fg=mg...

A car service station uses a hydraulic car lift, the diameter of its pistons are 0.02 m and 0.32 m calculate the pressure required to raise a car of mass 1800 KG I don't know how to get the area ?

if you have a magnet that pulls 40lbs of force if you broke that into 2 how much force will each magnet pull. i have some neodymium magnets from hardrives and i want to break them up but i want to know if that's gunna make them lose a lot of force. anyone know the formula for calculating...

I will be taking calculus soon and want to know what yo expect from the course. please give as many details as possible. thank you

Cohesive forces holds stuff together, these forces being strongest in solids. However, why don't things (say, a stone) stick back together if I push them close?

I don't know much about physics but I know some math. So say I want to set up an experiment (hopefully easily reproducible) where I have a string (I can find out what I like about the string) tied to a spot above the ground. It is hanging straight down. Say I tie a zip lock back to it and I...

Hi people, I was wondering what method could I use to break down such a bond. Thanks for answering

I'm new to the subject and i have an intuition that during the time the substrate and the enzyme are together energy is transferred to the substrate (from the enzyme) to break the bonds and to release the substrates energy*. But alas i have been met with opposition to this understanding...

Supposedly the Split-finger is suppose to 'tumble' or drop as you can find in most references to the pitch. But it's almost impossible to find the answer to "why?" (perhaps because baseball pitchers aren't physicists?) But I have a theory. It involves knowledge on the way the curveball (12-6...

When breaking down a molecule using electricity, what determines how much of the substance is broken down per second. Is it the voltage, current, or something else I'm not thinking of?

Hi Guy's (and by guy's I mean guys and dolls:) I am trying to figure out what things (forces, anti-forces?) can break, or undue the electromagnetic forces that bring atoms together to make molecules. Is there only one type of force (magnetic?) - if so what can undo that force as well. These...

The courses I've taken are algebra, trig, calculus 1 and 2 with analy. geometry and elementary linear algebra. Now that I have a three month break I plan on reviewing calc 1 and 2, and linear algebra. I would also like to learn a new topic but I don't know what subjects would be in my range of...

Homework Statement I am a bit confused on when to break up static equilibrium problems into their linear components, vs just jumping straight into angular torque without breaking the linear forces into their respective components. For example: A uniform plank of mass 30kg and length 2.0m...

Okay, here is a question that I have not been able to get answered. My Grandmother, when she was alive made crafts out of broken glass. The goal was to have broken glass with no sharp edges. These are the steps. First she would heat the bottle in the oven. Then she would remove the bottle using...

Homework Statement A car travels on a horizontal street, straightforward. In some moment of time (t = 0), having a velocity of 20 m/s, the break is hit. It is required to find the time and traveled distance before the car is still standing. The friction coefficient between the wheels and the...