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. A

    (Fluid Flow) Differential momentum balance problem

    Attached pdf contains the problem, and my progress in working it. My question is, I'm not really sure how to proceed. Anyone care to push me in the right direction?
  2. L

    Why Do Balance Scales Stop Even If Unbalanced

    Homework Statement Quote from the question source: Homework Equations None given, but maybe: Torque = lever arm x force The Attempt at a Solution I drew a diagram which you can see here: http://i.minus.com/ibzw9bF4vAnaJ.png (The weight differences are probably very exaggerated.) But I am...
  3. A

    Fluid flow problem with the momentum balance equation

    All problem info, and my work is done in the attached pdf. Basically, I'm not sure that I have done it correctly.
  4. B

    Finding the energy balance of a hydroelectric power generator

    finding the "energy balance" of a hydroelectric power generator I proposed a new hydroelectric energy idea to somebody and they asked me for a "energy balance". I know nothing about physics or anything relevant to calculating something like this. If somebody asked you for the energy balance of...
  5. T

    Centre of Mass: Hammer, Ruler, Balance

    http://resources.scienceworld.ca/pdf/forces/Balance_Hammer.jpg How do I explain this in terms of centre of mass? And what's the definition of centre of mass in this context?
  6. C

    How to Calculate Heat Removal in Sulfuric Acid Production

    This was a question from one of my tutes earlier in the semester, and now that I'm revising for an exam I can't seem to remember how to do it. If anyone can help that would be great! Sulfuric acid is a major bulk chemical used in a wide variety of industries. After sulfur is oxidized to...
  7. agnibho

    Oxidation Number to balance a redox reaction

    Homework Statement Balance Cl2+NaOH -> NaCl + NaClO3 + H2O
  8. S

    Weight's effect on a current balance loop

    The problem is an experiment has been conducted where a solenoid current loop is matched to a current balance loop; the experiment was to determine the relationship between the current though the solenoid and the uniform magnetic field produced in the solenoid. one element of the experiment was...
  9. I

    Volume Balance on concentration in a tank

    Homework Statement Hi. I am trying to do a volume balance on the concentration in a tank. I don't know how to find the output and just need some help. I have attached the image showing the question from the paper. Thanks. Homework Equations INPUT = OUTPUT + ACCUMULATION The Attempt...
  10. T

    Energy Balance on heat exchanger

    I need to do an energy balance on a heat exchanger where an aziotropic mixture of 90% methanol and 10% water at 21°C is being heated to 261°C. The heat source is high pressure saturated steam at 31 bar and it is assumed that the steam leaves as condensate at the same pressure (31bar)...
  11. M

    Series Circuit: How Do Components Balance Power?

    How in a series circuit do the components know how much of the "electricity" to use? How does this happen? Why doesn't the first lamp in a series use all the volts? How does it know if there are any other lamps in the circuit? Any help would be greatly appreciated. :)
  12. C

    How do astrophysicists balance truth and creativity

    i met a brilliant scientist about a year ago he invented one very very important item that saved millions of lives little is known about space from an outsiders perspective atleast is yet scientists have to work with truths it seems like a delicate balance to find truths about space...
  13. S

    How don't neurons get enough K+ to balance out their inner negative charge?

    If resting potential is negative, then K+ ions shouldn't be passively exiting the cell. It doesn't make sense for a male that is attracted to females to leave a club full of females and go outside where there are lots of males. There are females to be had!
  14. G

    Method of characteristics for population balance equation

    Homework Statement The PDE: ∂n/∂t + G∂n/∂L=0 The initial condition: n(0,L)=ns The boundary condition: n(t,0)=B/G The parameter B and G above are dependent upon process conditions and change at each time. They can be calculated with adequate experimental data. Homework Equations...
  15. C

    Momentum and mass balance in fluid mechanics

    When I am reading the paper in fluid mechanics, I found a paragraph and two equations: "Since the fluid is considered Newtonian and incompress- ible of density ρ and constant viscosity μ, the dimensionless mass and momentum balance equations are:" \nabla \cdot \mathbf{v} = 0...
  16. A

    Formula to Balance Logarithmic or Continuously Compounding ?

    If I was interested in determining how to balance the rate of reinvestment of profits back into the original investment (to add to its compounding potential) while still growing the profit return on the investment. How would I go about calculating something like that ?
  17. O

    Balance of a car on an inclined plane

    Homework Statement A 900 kg car goes up along an inclined road by 30 degrees characterized by an acceleration of 0.25 m/s^2. If friction coefficient is 0.5, find the magnitude of the force that moves the car. Solution: F = 12285.6 N Homework Equations The Attempt at a Solution...
  18. I

    Balance of the cylinder on the rod

    It is told, that all homework-like threads should be posted there. So, here I go. Imagine such a situation: there is a vertical rod and a cylinder, with the hole diameter sightly larger than the diameter of rod. There is also a second rod, attached to the cylinder perpendicularly. There is a...
  19. I

    Balance of the cylinder on the rod

    Imagine such a situation: there is a vertical rod and a cylinder, with the hole diameter sightly larger than the diameter of rod. There is also a second rod, attached to the cylinder perpendicularly. There is a friction between the main rod and the cylinder. It is known, that if we put a...
  20. X

    Weight required to balance a boom stand?

    Hi! I am trying to build a stand with a boom arm for my acting classes and I need to find the weight required to balance it. The problem is that it looks like I was more like a swan when I was swimming in the physics lessons ... no a lot of drops stayed on my plumage ... :) Help...
  21. G

    Can anyone PLEASE tell me how a current balance works?

    I looked for hours and hours and I haven't been able to find any video or link [there's one REALLY bad video on youtube] and I REALLY need to know how a current balance works because that specific chapter that I'm studying on electromagnetism has questions mostly coming up with the current...
  22. A

    Balance of oxygen in the atmosphere

    Is the amount of oxygen in the air always the same?if yes,how?or if not, how not?
  23. S

    Nodal Analysis and Power Balance in AC Circuits

    I'm working on an ac circuit, and we were told to use nodal analysis. Furthermore, we are asked to show a power balance between the sources and the power dissipated in the resistors, along with a reactive power balance between the sources and the inductors and capacitors. I have this formula...
  24. J

    Power System Load Balance: Explained

    In the context of power systems, what does it mean for a load to be unbalanced? Or for that matter, balanced?
  25. M

    To determine the mass of a liquid using an electronic balance?

    how do you determine the mass of a liquid using an electronic balance ?:S Anyone knows how ?
  26. S

    Balance Beam: Solve + Explain Help

    Homework Statement 01"{ 5. (12)A balance beam device comprised of a 200 cm long beam of unobtainium (no mass) ] \]and a fulcrum located in the middle of the beam is balanced straight and level. At the right side of the beam system a mass of 30 kg is attached and at the other end of the...
  27. G

    Force Calculation to balance arm

    Hello, I am after a little help on an applicaition, I need to calculate the force require to hold a pivoted arm in a position using a pneumatic ram. Basically the arms C of G is 740mm up the arm, and the arm weights 100kg. Roughly 1000N working at an offset of 147mm. The arm is 16 degrees...
  28. tony873004

    Complete equation, then balance

    Homework Statement This is a single displacement reaction aluminum + hydrochloric acid --> Homework Equations The Attempt at a Solution Since I know its single displacement, and I know that aluminum can't trade places with chlorine because one is a metal and one is a non-metal...
  29. Z

    Total Excess Charge using a Coulomb Balance

    Homework Statement If conducting a Coulomb Balance experiment, and a question asks to estimate the total excess charge on a sphere with a conducting surface charged to 2,000,000V potential. Is there a specific equation I should be using to estimate this? Thank you. P.S. why are...
  30. M

    Rotational Statics Of A Balance Beam

    Homework Statement A gymnast with mass m1 = 48 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 121 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam. 1)What is the...
  31. D

    Proving AVL Tree Height using -2 to 2 Balance Factor

    Homework Statement An avl tree typically balances with a balance factor of -1, 1, 0. What if the tree allows -2,-1,,0,1, 2 as a balance factor. Prove or disprove that the height of the tree is logarithmic to the number of nodes O(logn) Homework Equations Normal balanced AVL tree everyone...
  32. P

    Calculating Mass of a Slug: Using Centigram Balance

    I do online schooling or I'd just ask a teacher anywho I need to find the calculated mass of a slug by difference, I'm using centigram balance to calculate everything. This is what I know so far: Snug w/ beaker: 52.42g Snug: 2.42 Beaker: 50g I don't know if I should divide or subtract them.
  33. T

    Average force and a balance []

    I have to deliver this problem resolved in 4 hours, I didn't think it was going to be so hard... Homework Statement A man of mass M is on the top of a balance with a very high damping coefficient. In a given instant he throws a ball of mass m vertically, catching it again later. a)...
  34. T

    Materials Balance question for assignment. Help needed.

    Hi guys, I'm currently doing an assignment which seems to be beyond my knowledge and would like to ask for some helps. There are 2 questions I am currently stuck on: 1] A natural gas analyzes CH4, 80.0 percent and N2, 20.0 percent. It is burned under a boiler and most of the CO2 is scrubbed...
  35. J

    How does (AlK(SO4)2•12H2O) balance?

    So like say you have (AlK(SO4)2•12H2O) And then how does the reaction go? Is it like (AlK(SO4)2•12H2O) -> AlOH + H2SO4 or something like this? Was also wondering how like (NaCH3COO) would work with H2O as well... same for this (Cu(NO3)2•2.5H2O) These are acid-base, and I am pretty new to...
  36. M

    Energy balance in hydraulic cylinder

    hello everyone, In a hydraulic cylinder high amount of load is lifted by applying lower loads in smaller diameter side.. for example, if the diameters of two cylinders is 2cm and 4 cm and i applied a force of 10 N on the 2cm cylinder for 4m downwards. so now the 4cm diameter cylinder could...
  37. K

    Understanding the Balance: Equal Weight, Unequal Position

    Confused about a simple thing... For a common balance, since both arms have equal weight, what causes the pole to choose a horizontal position? Shouldnt it be stable in any other position as the torque around the centre is zero for any other position too?
  38. S

    How do i balance this chem equation?/can i use decimals & fractions?

    the question asks me to balance the following equation C2H3NO + H2O ---> C2H8N2O + 2CO2 i attempted to balance it 2C2H3NO + H2O ---> C2H8N2O + 2CO2 i can't get all the oxygens to be equal, if someone can show me how to do this last step, id appreciate it also can one use...
  39. L

    Integration of an energy balance equation, with respect to time.

    Hi Guys, I was hoping someone would be able to help me with this integration. It's been killing me haha. I've got this energy balance equation: mgh = 0.5m(v^2) + 0.5I(w^2) + T(theta) Basically, It's a gravitational potential energy that is converted to a velocity of a falling object...
  40. D

    Energy balance in fusion and fission

    I have argued with others on the Talk Polywell forum about the Nuclear Binding Energy per Nucleon vs the Total Nuclear Binding Energy per Nucleus graphs (which is the NBE/Nucleon * the atomic mass number). Despite referenced statements that, while the total binding energy increases continuously...
  41. rhody

    Took my balance in my 401K program out of all stocks, bonds

    I just took my balance in my 401K program out of all stocks, bonds, and corporate stock funds and put the into FIXED. I never thought I would see this day happen, but what I see (not happening) in Washington in addressing the debt limit gives me cause for concern. IMHO, it is better to...
  42. turbo

    New Balance Athletic Shoe Sale

    For PF members that are within driving distance, please contact me if you want to save up to 40% over the factory-store prices on these shoes for your kids and yourself. My wife would like to enjoy her vacation, but if I asked her, she would be happy to accompany you to the sale and apply her...
  43. H

    Weight Change of Coke Can When Opened: Explained

    when a can of coke placed in a sensitive balance is opened what happens to the reading? the answer of this question is given first increases and decreases. can anyone explain this?
  44. W

    Measuring mass without a balance

    Homework Statement You are to design, build and test a method to accurately measure the mass of an object. You cannot directly weigh the object but must use experimental data to determine your result. You cannot build any type of spring balance or beam balance. You are to determine your method...
  45. A

    Energy balance at the bottom of a water-filled hole

    Homework Statement Hello all, this is my first post and I'm hoping someone with more of a physics background can help me... I'm trying to determine the energy absorbed by some opaque material at the bottom of a hole of uniform radius filled with fresh water. The hole is located within a...
  46. Z

    Prevent Fruit Fraud: Spotting Manipulated Beam Balances

    I bought some fruits from the market yesterday and after returning home, I found that some fruits were not weighed properly. In my country (India), they use traditional beam balances. I ordered for 0.5 kg berries and found that they were only 360g on an electronic balance. Does anyone here know...
  47. B

    How Do You Calculate Work Done by Water in a Piston-Cylinder Assembly?

    Homework Statement A piston-cylinder assembly contains water, initially saturated liquid at 150 degrees C. The water is heated at constant temperature. a) if the rate of heat transfer to the water is 2.28 kW, determine the rate at which work is done by the water on the piston, in kW.Homework...
  48. J

    Solving Balance Scale Math: X vs Y Weight Difference

    I was trying to figure out the following - assume you have an old fashioned balance scale, with two pans hanging from a lever with a fulcrum in the middle of the lever. On one side you have a weight of X, and on the other side you have a weight Y. If Y is big enough, that side of the scale...
  49. R

    How to use a spring balance in space?

    A spring balance cannot be used to measure the weight of anything under the conditions of a space shuttle. Is there any way you might use a spring balance to compare the 'heaviness' of twin babies born on the shuttle? Discuss. I don't know how you'd use a spring balance in the shuttle.. Any...
  50. M

    How to set up the balance equation

    https://www.physicsforums.com/attachments/33615 I have problem with these two questions, can you give me a hint and help to understand it, I do understand problem 7-3 but i have problem with applying the equastion, I don't understand to 7-2 but i knw we have to have an addition term for the...
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