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. D

    Material Balance Lead in a lake

    Homework Statement Question 2. Tetraethyl lead was used in early model cars to help reduce engine knocking, boost octane ratings, and help with wear and tear on valveseats within the motor. In Australia, our petrol contained lead between approximately 1950 and 2002. Consider the impact of...
  2. D

    Material Balance: Determine Minimum Ditch Length for 90% Odour Reduction

    Homework Statement Question 1. An industry uses a long drainage ditch to break down their wastes and in particular to remove the odour. The waste travels along the ditch at a velocity of 0.5 m/h. The odour is reduced as a first order reaction with a reaction constant of k=0.30 day-1 The...
  3. M

    Calculating Heat Balance & Steam kg/kg for Different Variables

    Hello, Im new here, sorry for my english, but I am in desperate need of help regarding my own experiment which i need to finish. I need to calculate steam kg/kg (flash steam maybe in english?). Basically i have entering steam temperature and pressure and exiting steam temp. and pressure from...
  4. M

    Mass balance on oxidation of ammonia for production of nitric acid

    Homework Statement The following chemical reaction takes place inside a reactor where 80% conversion is obtained with an equimolar mixture of NH3 and O2 fed at the flow rate of 100 mol/h. 4NH3 + 5O2 ⇔ 4NO + 6H2O What are the output rates of all species? There's a diagram shown where...
  5. metapuff

    Why is it easier to balance on a moving bike than a stationary one?

    Why is it that it's much easier to balance on a moving bike than a stationary one? I've heard a few different answers: 1. The wheels of the bike each have their own angular momentum vectors, which like to stay pointed in the same direction, and hence resist tipping from side to side (sort of...
  6. gfd43tg

    Entropy balance for air stream

    Homework Statement Ten kmol per hour of air is throttled from upstream conditions of 25°C and 10 bar to a downstream pressure of 1.2 bar. Assume air to be an ideal gas with Cp= (7/2)R. (a)What is the downstream temperature? (b)What is the entropy change of the air in J mol-1K-1? (c)What...
  7. Q

    Charge Balance Approximation

    Homework Statement Question: is the charge sum an approximation? Homework Equations E.g. consider 0.10 M Na_{2}SO_{4} solution. Charge sum appears to be 0.20 from elementary stoichiometric considerations. The Attempt at a Solution The charge sum, however, seems to be ignoring...
  8. Dishsoap

    How would you balance raising a family and being a professor?

    First of all, let me just say I'm a long way away from being a wife/mom and from even thinking about having a career. I'm still an undergrad. Although I love physics and want to pursue a PhD and eventually begin a career, I guess that being a mother is more important to me. And now that it's...
  9. djh101

    Gouy Balance Nonlinear Slope (Magnetic Susceptibility Lab)

    I am currently analyzing my data for the physical chemistry magnetic susceptibility lab. All the data is giving nice, smooth graphs for force vs. current, but I am unable to linearize them. F = \frac{1}{2}\chi\mu_{0}AH^{2} I have plotted force vs. current and force vs. current squared...
  10. tony873004

    How can I calibrate my Ohaus cent-o-gram model 311 balance scale?

    I have a classroom full of Ohaus cent-o-gram model 311. Most work fine, but a few I can't calibrate to 0. I've used the calibration screw, but even maxed out it isn't enough. I could always place a couple of pennies under the tray, but there's got to be some way to do a course adjustment...
  11. A

    Strength of magnetic field required to balance gravitational force

    Homework Statement A particle with charge q = 4.00 10-6 C and mass m = 1.30 10-4 kg is moving parallel to the Earth's surface at a speed of 1000 m/s. What minimum strength of magnetic field would be required to balance the gravitational force on the particle? Homework Equations Not...
  12. Q

    Solving Charge Balance for 1 M CaCl_{2}

    Homework Statement For 1 M CaCl_{2} what is the correct "charge balance" for all species? Homework Equations Charge balance is an algebraic statement of electroneutrality. The sum of positive charges = sum of negative charges. The Attempt at a Solution My prof never really explained how...
  13. PsychonautQQ

    Moment of Inertia of a Thin Rod about its Center

    Homework Statement A thin, uniform, 3.8kg bar, 80cm long has two 2.5 kg balls glued on at either end. It is supported horizontally by a thin, horizontal, frictionless axle passing through its centers and perpendicular to the bar. Suddenly the right hand ball becomes detached and falls off, but...
  14. R

    Nonliear Vibrations- Incremental Harmonic Balance Method

    Homework Statement Consider the van del Pol equation [tex]\ddot{u}-ε(1-u^2)\dot{u}+u=0[\tex] Determine the limit cycle for ε=1 using the incremental harmonic balance method. Validate the result using numerical integration (e.g., Runge Kutta). Homework Equations It's incremental...
  15. D

    Concentric Tube Heat Exchanger - Clarification on Energy Balance

    I'm trying to model a Transfer function for the response of the deviation in temperature of water coming out of the concentric tube heat exchanger in response to an input velocity of water function. THE PROBLEM I start the derivation with a couple equations in Seborg's Process Dynamics...
  16. F

    FO Differential equations and account balance

    Homework Statement a. Assume that yo dollars are deposited into an account paying r percent compounded continuously. If withdrawals are at an annual rate of 200t dollars (assume these are continuous), find the amount in the account after T years. b. Consider the special case if r = 10% and...
  17. H

    How do you balance equations with 3 reactants?

    Homework Statement Ca3(PO4)2 + C + SiO2 --> CaSiO3 + CO + P4 Homework Equations The Attempt at a Solution I'm okay with balancing reactions that have 2 reactants but when there's 3 i take an extremely long time to do it. is there any easy way or strategy to go about balancing...
  18. D

    Algebraic method to balance redox equations

    Hi all, I'm learning how to solve redox equations. I found the algebraic method to solve equations such as this one: Fe^{2+} + Cr_{2}O_{7}^{2-} +H^{+}\rightarrow Fe^{3+} + Cr^{3+} + H_{2}0 and i was able to solve it. What I don't see is how to use that algebraic method to solve an...
  19. M

    Steady State mass balance for separation of cyclopentadiene

    Hello, Here is a homework problem that I have been working on. I am wondering if for the mass balance of substance A, do I include the terms in the reaction rate that involve species R and B? Also, wouldn't A and B start reacting in the pipe before they even go into the CSTR? (I guess put in...
  20. S

    Thermodynamics Closed System Energy Balance

    Hi everyone, I am currently reviewing for a thermodynamics exam and have come across a difficult problem while studying. Here it is: An insulated tank containing helium, a monatomic gas, at P1t = 1000kPa and T1 = 800K is connected to an initially evacuated insulated piston-cylinder device...
  21. X

    Atom Balance: C & O for CO and O2 Reaction

    Homework Statement One mole of CO and 1/2 mole of oxygen are mixed and the products consist of CO2, CO, O2, and O. Write the atom balance for C and O. Homework Equations Mass conservation The Attempt at a Solution 1/2(O2)+CO2 -> aCO2 +bCO+cO2 +dO. a, b, c, d are unknowns. I make a table...
  22. adjacent

    Does a top pan balance show a greater value when a person jumps on it?

    A top pan balance measures the force.So if I jump(or fall from a height) on it,Why does it show a greater value?(Acceleration and mass does not change,so the force is same)??
  23. S

    Deflection and oscillations in a homemade microgram balance.

    Hi, As part of a larger hobby project, I'm building a microgram balance based on the one described at Sci-Toys.com, but I believe my questions are appropriate for the "general physics" forum. Background: I purchased a 36" threaded steel rod, connected it to a razor, and then put it on a...
  24. W

    Equilibrium, Charge Balance, Mass Balance

    Homework Statement Write the charge balance for a solution containing H(+), OH(-), Ca^(2+). HCO3(-). CO3^(2-) , Ca(HCO3)+, Ca(OH)+, K+, and CIO4(-).Homework Equations Also, I am having a trouble understanding the concepts of mass balance and charge balance. The Attempt at a Solution The...
  25. C

    Beta plus decay: mass balance?

    Hi: I am taking a radiochemistry class, and I am confused by beta plus decay. (1) p --> n + positron + electron-neutrino The mass of a proton is less than the mass of a neutron. In addition, the neutrino has mass as does the positron. (2) E = mc2 There must be come sort of...
  26. C

    Angular momentum or work-energy balance?

    The apparatus above has an initial angular velocity of \omega_{1} as the rods are released. I need to find the angular velocity \omega_{2} of the apparatus at the bottom. I've tried 3 methods. First I tried a work-energy balance where I included a gravitational potential energy. KE_{1} + PE =...
  27. K

    Charge balance in observable universe

    Hi, I've been wondering about the charge balance in the known universe, factors that might alter it, and the consequences of any small imbalance that might exist. This is a sort of layman's theory. I don't expect it to be right but I'd love to understand how it can be refuted. I am surely...
  28. B

    Balance between generated and consumed power

    Homework Statement Consider an AC electricity system operating with a balance between generated power and the consumed power. Explain what happens to the frequency of a system if a large generator is suddenly disconnected. Explain the role of the governors of the remaining generators in...
  29. R

    Calculate Balance Point Distance: A, B, C & D

    Hi All Ive been racking my brains and i just can't remember how to calculate a 'seesaw' type balance point!? Please see the attachment - It am trying to work out what 'C' is (I know A, B & D) Thanks very much
  30. Rolen

    Professorship: how to balance all your duties.

    We all know that a professor has many attributions such as teaching, administrative stuff and of course research. But, how you and your colleges deal with this? I've seen a lot of professors that find teaching very rewarding while other neglect the teaching part and just focus on research. I'm...
  31. B

    Out of balance rotating system

    Figure Q4. illustrates a rotor assembly with out-of-balance rotor discs in planes A, B and C. The out-of-balance mass x radius products in planes A and C are as indicated in the figure. The out-of-balance mBrB in plane B and its angular position \ThetaB are such that the system is in static...
  32. J

    See Saw Weight Balance: How to Find Angle Beta with Two Sensors?

    Hi everyone , I have a small question .. I have attached a ppt . I am having two sensors which can measure the weight of my object at two end position so fmy support .. My question is that can i find the angle beta if am having the value of X kg and Y kg .. your answers would...
  33. J

    Balance of a metal rod problem.

    1. Homework Statement I am trying to determine the limitations to my experiment and thus how to improve them. The experiment's objective is to determine the mass of a metal rod. The rod is balanced every time another 1kg is added onto the end of the rod. This means that the rod cannot...
  34. rakeru

    How do I balance this chemical equation with a fraction?

    Homework Statement Hi! I am currently learning how to balance equations in chemistry but something that I don't understand is using fractions to balance an equation. I have a problem that I can't work out because I'm so confused! The problem says: Complete and balance the acid-base...
  35. T

    Mass Balance of Biomass Question

    The Problem: Bio fuels are receiving more and more attention. For biomass waste materials (cellulose, manure etc.), the first step in the process is typically to convert the biomass to sugar (glucose, C6H12O6). This first step is only able to produce 0.1 g glucose per g of biomass. The...
  36. PhizKid

    Is there a mathematical way to balance equations (by hand)?

    As opposed to guess and checking by inspection. Is there a method mathematically like with an algorithm or something to balance equations by hand (without the aid of any computer programs or anything like that except a simple calculator)?
  37. H

    Flash vaporization balance - ODEs, deviation variables, linearization

    Homework Statement Given the attached figure, a) Develop an ordinary differential equation that describes the dynamic height h(t) in the flash tank in terms of \dot{m}_{i}, \dot{m}_{l},\dot{m}_{v}, \rho_{i}, \rho_{l}, \rho_{v}, and A. b) Given the fact that the process is isenthalpic...
  38. F

    Charge on a particle to balance its weight

    1. What must the charge of a 1.45g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 650N/C? Homework Equations E = \frac{F}{q} The Attempt at a Solution So the field is pointing downwards. E fields point in the direction a...
  39. D

    Struggling to find a balance with final year workload

    Hi all, I was looking for some advice for my course as I have just entered the final semester of my final year and already find the workload overwhelming. I'm also trying to avoid leaving everything last minute like I usually do :) This semester I have 5 classes and a thesis to write(as...
  40. P

    MHB Method of dominant balance

    solve (first three terms) $y''-(2+x^2)y=0$ using the method of dominant balance (for large x). I solved this and got 4 different solutions when I think I should be getting 2.
  41. Mordred

    Exploring the Possibilities of a Pre-Big Bang Energy Balance

    Several articles I've read describing one theory of how everything could have started from nothing. State that all the energy of nothing equals zero as gravity is negative energy. One of those articles was written by Stephen Hawkings. He also stated that quantum fluctations will always exist...
  42. S

    Calculating Gravitational Balance Point between Earth & Moon

    Homework Statement The mass of the Moon is 7.35*10^22kg. At some point between the Earth and the Moon, the force of gravitational attraction cancels out. Calculate where this will occur, relative to Earth. Me = 5.98*10^24 kg Mm = 7.35*10^22 kg D = 3.84*10^8 m g = 6.67*10^-11 Nm^2/kg^2...
  43. J

    Does the orientation of a crossbow affect its accuracy?

    I have been shooting both a Vertical Crossbow and a Horizontal Crossbow, I find that I shoot the vertical crossbow (off hand or free hand, without a rest) much more accuratlly than I shoot the Horizontal Crossbow, Is there a technical reason why? Most all vertical compound bow shooters (shooting...
  44. M

    Iron and plumbum (lead) on a balance in air and water

    On the flat bottom of an aquarium is an old fashioned balance. On one scale of the balance is a piece of plumbum, on the other side is a piece of iron. The scales are exactly in balance. Now we let the aquarium fill slowly with water, until the entire balance is under water. What happens now...
  45. S

    New Balance Reading After Adding a Stone: X + Y - Z?

    Homework Statement A cup of water has weight X. A stone has weight Y in the air is immersed fully in the cup and it displaces water of weight Z. What will be the new reading on the balance after the stone is immersed inside the cup? Homework Equations The Attempt at a Solution My...
  46. F

    Momentum balance derivation in equations

    I'm a little confused, in my fluid mechanics course we've covered many equations and they are all derived using an x-direction fluid flow. If I was to use these in a system in which fluid flowed in the y-direction would I have to re-derive them? Or would it be more of a case of using a...
  47. F

    Why does a Scale Balance Horizontally?

    This may seem like a really dumb question, but I can't figure out what the answer is, so please just bear with me. Why does a balance that is equal come out straight? If one side is tilted slightly lower than another, shouldn't it just stay that way since the masses are the same on either...
  48. P

    HW Lab PHYS101: Net torque of pulley system and meterstick position balance

    THANKS, I ONLY NEED HELP #2 NOW, PLEASE 10/31/12 @ 9:10 pm bumpHomework Statement 1)If the fulcrum of a 0.1 kg meter stick was placed at the 40 cm mark and a 200 g mass at the 0 cm mark, would it be possible to balance the meter stick with a 200 g mass on the long side of the meter stick? What...
  49. S

    Automotive Heat/energy balance for a high power petrol engine

    Hi, first post newbie here, so go easy please:smile: I'm trying to get a grip on the understanding of a car cooling system for a friends race car. It seems the more I look into it the more questions I'm left with. For this post I would like to clarify the coolant side, leaving the air side...
  50. H

    Balance Wheel inertia/torque issue.

    I am a watchmaker and need some help with the formula and correct units to derive the Frequency of the Balance wheel. I'm am trying to prove the formula with a known Balance Wheel/Spring and Frequency but using all known values still cannot get the formula to work. When I have a working formula...
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