What is Balance: Definition and 483 Discussions

New Balance (NB) is an American sports footwear and apparel brand that was established in 1906. The brand was originally associated with the New Balance Arch Support Company. Today the brand is associated with New Balance Athletics, Inc., an American multinational corporation and its parent New Balance, Inc., a Jim Davis owned holding company that owns New Balance Athletics, Inc. New Balance Athletics, Inc. and New Balance, Inc. are both based in the same headquarters located in Boston, Massachusetts.
New Balance is one of the world's major sports footwear and apparel manufacturers and maintains a manufacturing presence in the United States, as well as in the United Kingdom for the European market, where they produce some of their most popular models such as the 990 model—in contrast to its competitors, which often manufacture exclusively outside the United States and Europe. As a result, New Balance shoes tend to be more expensive than those of many other manufacturers. To offset this pricing difference, New Balance claims to differentiate their products with technical features, such as blended gel inserts, heel counters and a greater selection of sizes, particularly for very narrow or very wide widths. The company has made total profits of approximately $69 billion since 1992.

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  1. X

    Solving Energy Balance Problem for Steam Flow through Nozzle

    I am doing a problem about steam flowing through a nozzle. Here are the initial and final conditions.. P1=30 bar = 3000kPa T1=320 C v= 100 m/s (v= velocity!) P2=10 bar = 1000kPa T2= 200 C Mass flow rate = 2 kg/s (Steady flow process) To me it seems like a cut and dry energy balance problem...
  2. C

    Material Balance Problem Involving Ideal Gases- Any ?

    Homework Statement A furnace is fired with 1000 feet cubed per hour at 60 degrees F and 1 atm of a natural gas containing the following volumetric analysis: CH4: 80%, C2H6: 16%, O2: 2%, CO2: 1%, and N2: 1%. The exit flue gas temperature is 800 degrees F and the pressure is 760 mm Hg absolute...
  3. J

    Thermodynamics Energy balance Equation

    I am going over some thermodynamics right now and I am looking at the energy balance equation which is dE/dt = mdot*j(in) - mdot*j(out) + Qdot + Wdot(external) I understand this means that the change in energy with respect to time equals the sum of the mass energy that goes into a system, minus...
  4. M

    Kirchoff's radiative balance law and polarisation of emitted light

    I'm looking at a surface at an angle. Light reflected to me is polarised (Fresnel), does this mean light emitted to me from the surface is also polarised? I've been told that ocean emission is polarised (when looking at an angle) because of Kirchoff's law of radiative balance (emissivity =...
  5. A

    Why Does a Balance Regain its Equilibrium Position?

    If an ordinary balance with two equal weights is displaced slightly from its equilibrium position then it regains its original position. Why? There is no unbalanced torque at any position. So why should it regain its position? I am totally confused on this one. Can anyone help...
  6. T

    Lab Preparation Using a solid, DI water, a balance, and a flask

    Homework Statement Describe how you would prepare exactly 250 mL of .180 M K2S2O8 solution for use. Assume that you have a supply of solid K2S2O8, deionized water, a balance, and a volumetric flask. Also, how many grams of K2S2O8 would you need? Homework Equations The Attempt at a...
  7. rhody

    Ted Video How to make work-life balance work

    http://www.ted.com/talks/nigel_marsh_how_to_make_work_life_balance_work.html?utm_source=newsletter_weekly_2011-02-08&utm_campaign=newsletter_weekly&utm_medium=email" Nigel has a dry sense of humor, even though a few lines I have heard in other contexts before, IMHO, worth watching...
  8. E

    How to balance chem.eq. with crystal water?

    Homework Statement 10 g Fe and x ml H2SO4 forms y gFeSO4*7H2O Write a balanced chemical equation for the reaction, and determine the coeffisients y and x. The H2SO4 is 1 M. Homework Equations n=V*c n=m/Fm The Attempt at a Solution First thing I was trying to set up the chemical...
  9. L

    Will Telling About Bank Balance Affect My Pell Grant Amount?

    I was just about to apply for my pell grant and it wanted me to tell them how much I have in my bank account. How much will that affect how much money I get from the grant? Does anyone know? If I have a lot, like 10 thousand, will that make me get a lot less, or none? Or if I have under 2...
  10. W

    Ethanol mass balance question

    Haven't taken a course in distillation in a long time and now myself and some others are working on getting a fuel ethanol still going and wanted to do the calculations before we moved forward. We have a beer that is 12% alcohol and reaching a purity of 90% EtOH in the distillate. The mass...
  11. M

    How to balance a chemical equations?

    like this: 1)H2SO4 + Al(OH)3 --> Al2(SO4)3 + H2O 2)Pb2+ + Cl- --> PbCl2 and word equation like this ethane(C2H6) + Oxygen --> Carbon dioxide + Water vapour Thq.
  12. rcgldr

    Econonmic policies to balance interest of the many versus interests of the few?

    There are two main issues I'm interested in for this thread, and how far should regulations have to go to control these issues? 1. The conflict where an individual is in a position to make decisions that benefit the individual at the risk or detriment of the company or other employees...
  13. S

    Material balance help, chemical engineering

    Homework Statement Toluene is recovered from a mixture of toluene and nitrogen (containing 52 mol% toluene) by cooling the mixture at constant pressure of 1.2 bar to condense out some of the toluene. If the flow rate of the mixture into the condenser is 179 kmol h-1, determine the flowrate of...
  14. L

    Torque and Statics Balance Problem

    Homework Statement Two pans of a balance are 50cm apart. If the fulcrum is displaced by 1cm what percentage is the true weight marked up? Homework Equations T=rFsinθ F=mg The Attempt at a Solution I solved for torque of the fulcrum in a hypothetical situation where a mass of 1g is...
  15. Y

    Dynamics: Finding distance to reach balance point of a wheelie.

    Homework Statement Background: This is a problem I made up as part of an extra credit assignment for my first dynamics (engineering) class. I know the system will of course roll over, and he will end up looking like a fool, but that is besides the point. Keep in mind also that I can modify...
  16. S

    Material balance- purge cycle help

    I am really struggling to get to grips with this question, ( struggling with material balance overall!) I can do dimple material balance however for things with a recycle stream or purge stream, really confuses me. I have the solution which I will post up, but I still don't get 'why' it...
  17. P

    Spring Balance: Mass or Weight? Clearing Out Confusion

    By definition, the difference between Mass and Weight is easy to comprehend. However, I am really confused, confused to the level I feel like ripping all the hair out of my head, with spring balances: After researching a lot, I think that as I step on a spring balance the spring will extend...
  18. A

    Why there isn't a work term in entropy balance equation?

    Homework Statement Hi, I need your help in my homework. My Instructor asked that question? Why there is not a work term in entropy balance equation? Homework Equations The Attempt at a Solution I have researched about it and I found that, entropy has not an exact physical...
  19. D

    Deceptively difficult material balance problem. HELP

    I have been working on what I thought was an easy problem. This was a one hour quiz in which the whole class failed, the instructor decided to give it as a homework assignment instead. ------problem start--------- Considerable interest exists in the conversion of coal into liquid products...
  20. I

    Mass Balance and Enviromental Reactor

    Homework Statement 1) A spill of 5kg of a soluble pesticide takes place into a well-mixed pond. The pesticide is subject to volatilization that can be characterized by the first order flux J=VvC, where Vv = volatilization mass-transfer coefficient of 0.01m/d. Other parameters for the pond...
  21. J

    Lever Balance Displacement Calculation

    Hello I am trying to design a force balance lever system. Basically the initial state will in a force balance equilibrium. That is, there will be a mass m placed onto of the capacitor plate to keep the lever balanced. I will then ramp the voltage of the capacitor up, causing a force of...
  22. Jadaav

    Why do we use/calculate the atoms of an element to balance an equation

    Hi guys, I wanted to know these things with their respective examples : 1. What is an atom ? 2. What is a particle ? 3. Why do we use/calculate the atoms of an element to balance an equation ? Please answer to these questions guys, because I only have 2 days for my exams and to know them.
  23. A

    Transport phenomena - shell balance

    Homework Statement Use a shell balance method to derive the equation governing the two dimensional temperature distribution,u, in a circular disk in polar coordinate system(r,theta). allow for the possibility of differing thermal conductivities in the r and theta directions. Homework...
  24. G

    Exploring the Balance of Physics Research vs Coursework in the U.S.

    It it normal to like physics research better than solving problems for coursework? Is physics coursework in the U.S. is too problem-solving oriented? Thanks
  25. T

    Balance of Forces - Electrostatic Force vs. Gravitational Force

    Assume that you have two protons accelerated in opposite directions within a cyclotron. As they approach the speed of light their masses increase. At what proportion of the speed of light will their gravitational attraction (due to their increased mass) equal their electrostatic repulsion ?
  26. Z

    Finding True Weight with False Balance

    Homework Statement A body weighs 6 gms when placed in one pan and 24 gms when placed on the other pan of a false balance. If the beam is horizontal when both the pans are empty, the true weight of the body is : Homework Equations The Attempt at a Solution I don't know which...
  27. K

    Can detailed balance pricinple(DBP) be derived or is it an axiom?

    In my statistical mechanics class, my prof derived DBP in the following way: Consider a system with many quantum states |a>, |b>..., keep scattering with each other and in equilibrium the master equation give us : \frac{{d{P_k}}}{{dt}} = \sum\limits_{l \ne k} {{T_{kl}}} {P_l} - {T_{lk}}{P_k}...
  28. R

    Balance the force to find the angle

    Homework Statement A mass, m = 175 gram is placed on a hanger which has a mass of 50 g, giving a total mass of 225 g. The hanger is then hung at an angle of 120° over a pulley attached to the force table by using a string of negligible mass. The pulley over which the string rests has very low...
  29. D

    Need help balancing this chemical equation?

    Ag(subscript of 2)S + HNO(subscript of 2) -> Ag(subs.2)SO(subs.4) + NO(subs.2) +H(subs2)O TNX! PO!
  30. S

    Understanding Spring Balances and Series Setups

    Homework Statement This was a concept question my lecturer gave us, and although he tried to explain it thoroughly, I still didn't get it. So I was hoping someone could help me out. There are 2 parts to this question Firstly a spring balance is attached hanging from a celling using a...
  31. M

    Spiral balance spring questions

    [b]1. First off i am not a student per say, this is related to my hobby I am repairing an old clock and need to replace the balance spring which is completely missing. I have located ONE source that may carry suitable springs but I cannot figure out which spring to order. The spring...
  32. B

    Help with transient mass balance for desalination by destillation

    Homework Statement Homework Equations ordinary mass balance The Attempt at a Solution So far I have gotten: d[rhob*V]/dt = Min - ?
  33. H

    Measuring Mass with a Triple Beam Balance

    Homework Statement what is the measurement Homework Equations The Attempt at a Solution Is there something wrong with the picture or is it possible to have beam balance with two same scales (the upper and middle ones). If possible then the reading = 90 + 30 + 8 = 128 g ...
  34. V

    Balance proves gravity isn't a force

    consider a weight balance with two unequal masses on the two arms.It comes to rest after tilting a few degrees. If one of the masses really experienced a greater force, then there is no reason why the balance shouldn't tilt 90 degrees
  35. B

    Mutation Balance: Lost Traits & Complicated Species

    If a organism has a dna mutation, would this not imply that some trait is lost. If there is a mutation then somewhere in the dna there is a difference which would cause something to be missing. Is this right? If this is the case then how come complicated speices still have all there original...
  36. B

    Aircraft weight and balance related math - help needed

    Wondering if you have time for a (hopefully) quick math question: To put it simply, the equation is as follows: (xA + zB) / (x + z) = y Where all values except x are pre-determined, and x needs to be changed so the left equation equals y. y represents the center of gravity for a...
  37. R

    Nozzle Energy Balance: Solving Question B

    Im having difficulty with question b in this problem: [PLAIN]http://img705.imageshack.us/img705/9484/therm.jpg Heres my attempt: m(v1^2)*1/2)+h1)=m(v2^2)*1/2)+h2) + Qout (v1^2)*1/2)+h1)=(v2^2)*1/2)+h2) + Qout where v1 = 200ms^1 and v2 = 40ms^-1 and h1 = 3104.9kj/kg And my answer is 22,000kj/kg...
  38. L

    Balancing a mass using a balance beam

    Homework Statement A rock is attached to the left end of a uniform meter stick that has the same mass as the rock. How far from the left end of the stick should the triangular object be placed so that the combination of meter stick and rock is in balance? a. 0.25 m. b. between 0.25 m...
  39. U

    Exploring Balance, Charge, Rotation, Spontaneous Motion

    1. If you walk along the top of a fence, why does holding your arms out help you to keep your balance? 2. Charge is also said to be conserved. What does it mean? Explain. 3. When a car drives off a cliff, why does it rotate forward as it falls? 4. Why does a book sitting on...
  40. M

    What is the connection between detailed balance and thermodynamic equilibrium?

    Hey, I was wondering in what way the detailed balance condition (DBC) has to do with thermodynamic equilibrium. The DBC is defined as W(i\to j)P(i) = W(j\to i)P(j) with W the rates (probabilities per unit time) to jump from state i to j. P(i) is the equilibrium prob. density to have...
  41. P

    Current Balance, averaged mu0 values?

    Homework Statement While using a current balance to experimentally determine mu0 (4PI*10-7), two mu0 values were found (current was reversed to find one of these values) and averaged together in order to partially compensate for the effect of the Earth's field. Why does the flipping...
  42. A

    Is it possible to balance research and family?

    I find it tough to balance my research and my family and wonder how others succeed in this regard. Every serious researcher will agree, I hope, that research demands undivided attention for high quality work. How can then a researcher take care of her/his family adequately? Should she/he...
  43. F

    Uncovering the Truth Behind Power Balance Bracelets

    http://www.powerbalance.com/ Has anyone researched the power balance bracelet? I bought one for $30 and I'm going to test it on some high schoolers. I think everyone here would be convinced that this is complete quackery, however, I think there is still a valuable lesson about peer review...
  44. B

    Applied de involving bank balance

    moved
  45. S

    Question on oscillations spring balance and fish

    The scale of a spring balance reading from zero to 180 N is 7.00 cm long. A fish suspended from the balance is observed to oscillate vertically at 2.50 Hz. What is the mass of the fish? Neglect the mass of the spring. ________ kg Attempt k =(180-0)/(7-0) = 25.714 N/m frequency =...
  46. L

    How can I balance an Equation?

    Homework Statement Ok, please use my example of giving me a step by step guide on how to balance an equation: Homework Equations K + Br2 --> KBr The Attempt at a Solution I know that I should write down the equation, draw a line underneath the arrow to separate the balancing...
  47. L

    Process engineering mass balance in the douglas aproach

    Hey guys i was hoping for some help with the mass balance of the equations for the production of styrene from ethylbenzene. I have attached my problem sheet and my answer sheet, q 7 is what i am stuck on please help me i am confused
  48. M

    Stability & Balance of rigid bodies

    Homework Statement A steel girder with a mass of 1000kg and a length of 10m rests on a concrete slab, with 4m overhanging the edge. How far can a 100kg man walk on the girder? The Attempt at a Solution I supposed that the right end of the slab is the fulcrum (rotating point), and...
  49. Z

    Mass & Energy Balance Question Help

    I would appretiate help with the following 2 questions, I think I've got must of the first one right (Or went off t a tangent) but I don't now where to start on the second question 1a) Calculate the flue gas composition if 100 kmol h-1 of a gas whose composition is given below are burnt with...
  50. S

    Determining SN1/SN2 Balance for 2-Bromobutane Formation

    For example, if we have 2-butanol, a compound with a secondary \alpha carbon and I reacted this with HCl and NH4Br I would get 2-bromobutane (via nucleophillic substitution), but how would I determine whether this goes via SN1 or SN2 to achieve this? Now, if this was 1-bromobutane, I know...
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