Balance Definition and 490 Threads

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. 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 =...
  2. L

    How Do I Balance the Equation K + Br2 --> KBr?

    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...
  3. 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
  4. 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...
  5. 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...
  6. 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...
  7. R

    Thank you.Balancing Forces in Falling Rod: Solving for Normal Force

    Homework Statement Hi all. I've got a vertical rod on a surface with a fixed and frictionless pivot at bottom end. The rod of length L is released and begins to fall. The forces acting on the CM of the rod should be: - weight force: mg - centripetal (radial) force...
  8. E

    Balancing a Bicycle: Why Hard When Not Moving?

    Hello, I am just thinking: why it is hard to balanca a (2-wheel) bicycle when it is not moving, while it is easy balanced when it is moving? I hope that I am asking in the right forum. Thanks in advance
  9. G

    How Is Material Balance Calculated in Distillation?

    Homework Statement Question: A mixture of 40/60 mole% pentane/heptane is to be separated to give a top product of 95 mole% pentane and a bottom product of 5 mole% pentane. The column will operate at 1 bar witha reflux ratio of 0.5 kmol/kmol. It will have a total condenser and a partial...
  10. W

    Painter on a balance beam (rotational motion and Torque)

    Homework Statement A man of mass mm = 90 kg decides to paint his house. To do this, he builds a platform using a uniform beam with a mass of mb = 91 kg and a length of L = 7 meters. The beam is supported by two sawhorses, ---------------------- A B (distance from A to left...
  11. S

    Euler's Method With Mass Balance o.d.e's

    Hi I'm doing a practice paper for a past mathematical modelling exam. I've attached the problem What I'm having trouble with is simplifying the equations and variables into a differential equation that is solvable with Euler's Method. What I have currently is the sqrt(h1-h2) in the...
  12. D

    Multi-Step linear systems problem - Build ODE, impulse response, systems balance

    I messed up on the title of the thread.. I had a few questions but ended up solving them on my own. The only question I have is how to solve this ODE. Thanks. Homework Statement Solve the ODE (dx/dt)= f(t) - .1x Where f(t) = 2+sin(t)2. The attempt at a solution I faintly remember doing...
  13. T

    How can I balance this reaction using oxidation-reduction?

    Homework Statement BCl3+H2O2>>H3 BO3+HCl Homework Equations need to balanc it The Attempt at a Solution
  14. M

    Where should the proton be placed to balance F?

    Homework Statement A point charge q = -0.5nC is fixed at the origin. Where must a proton be placed in order for the electrical force acting on it to be exactly opposite its weight? Homework Equations F= k(q1)(q2) ------------ r^2 The Attempt at a Solution Trying to...
  15. B

    How Can I Optimize the Moment of Inertia for an Out-of-Balance Load?

    Hello, I am trying to make something that spins out of balance. currently my current weighs are half circle in shape. I know that if I change the profile of the weights to a pie shape (less than 180deg semi circle) the center of mass moves away from the axis of rotation, but at the same time...
  16. D

    How Much Power Does a 30m Diameter Windmill Generate?

    Homework Statement In this era of high energy prices, there is a focus on renewable sources of energy such as wind energy. Consider a large windmill 30m in diameter. On a windy day, suppose that the windmill entrains a stream of air 25 m in diameter at a speed of 14 m/s. Downstream of the...
  17. W

    News Fox News: Fair & Balanced? Investigating Claims of Corruption

    Fox News clearly picks a side when it comes to debates. How do you consider this fair and balance?How can they claim they are they only non-corrupt network? What did Obama gave CNN? What sides of any issue has a CNN news caster picked?
  18. S

    Q-1: Weight of Body on False Balance Q-2: Maximizing Energy in Swimming

    Q-1 : A bodu weighs 8 gm when placed in one pan and 18 when placed on a other pan of a false balance . If the beam is horizontal when both the pans are empty , the true weight of the body is Q-2 : when one swims across a river max. energy is spent in second 1/3 of the distance why ?
  19. Z

    Balance condition for inductor bridge

    1. A Wheat stone bridge resembling setup is given with two parallel branches , the 1st containing an Inductor of Inductance L1 and resistance R1 in series with a resistor R2. The second branch consists of inductor with inductance L2 and resistance R3 in series with a resistor R4. The branches...
  20. R

    Was Energy Balance Overlooked When Examining Evaporation from Solids?

    I am curious. Maybe I don't understand something, but many articles I come across perform an energy balance on a solid and on a liquid. **I assume evaporation acts on the remaining liquid and not directly on the substrate. Correct?** They always include heat loss due to evaporation as...
  21. G

    Calculating the Upward Force Necessary to Balance a Plank

    A uniform plank us supported by a hinge at one end. What is the magnitude (expressed as a multiple of the plank's weight Fg) of the upward force you have to exert on the other end to keep the plank at rest and level?
  22. V

    How Does a Submerged Stone Affect Balance Scale Readings?

    Homework Statement A beaker with water is in equilibrium with a certain weight in a balance. Then we tie a cord to a stone, and soak the stone in water, without touching the bottom. What will the balance read and why? http://dl.getdropbox.com/u/698994/ilustra%20forums/experiencia%20empuxo.png...
  23. EnumaElish

    Plants & CO2 Balance: Absorption & Release

    Do plants absorb as much carbon-dioxide as they release? Is there a CO2 balance, deficit, or surplus in the plant world?
  24. W

    Extending arm with counterweight balance question

    Hi guys, I'm working on a prototype for a lamp and have quickly overreached my meagre school boy mechanics skills, almost at the first hurdle, in fact. Embarrassing, I know, but hopefully some kind soul here will be able to point me in the right direction. A picture is worth a thousand words...
  25. D

    Determine the Distance for Balancing Uneven Weights

    does anyone no of a math formula to balance uneven weights? say if i had a 100g (3.5oz) weight on a bar 100mm (3.9in) from a center point and another weight of 150g (5.5oz) how far will it need to be from the center to level the bar. could it be as simple as double the weight double the...
  26. L

    How Are the Currents in a Solenoid and a Loop Related in a Current Balance?

    Homework Statement I'm doing an assignment involving a current balance, and the one thing I don't understand is the currents. I have two separate currents, one labeled "Current in Solenoid" and another labeled "Current in Loop". Now, I know the current in the loop is the part that causes...
  27. V

    Can You Help Balance this Redox Equation for Homework?

    Homework Statement Balance the equation (Note: the coefficients provided may be wrong): 3 Co(s) + 8 H+(aq) + 8 NO3-(aq) → 3 Co2+(aq) + 6 NO3-(aq) + 2 NO(g) + 4 H2O(l) The Attempt at a Solution I started out by doing a half reaction Co → Co 2+ +2e- This...
  28. C

    Mass/charge balance of Beta decay/nuclear reactions

    Homework Statement There are three different reactions we did in class. B-: 6C14 --> 7N14 + e- B+: 6C11 --> 5B11 + e+ Nuclear rxn: alpha particle + 7N14 --> 8O17 + e+ Homework Equations Q tot = (mass inital - mass final) * 931.5 MeV Charge balance The Attempt at a Solution In...
  29. R

    Adult Education Center: Finding the Right Balance for University Admittance

    Here is my current situation, as a high school drop out, I can continue my education at a so called Adult Education Center. This means I can choose my schedule that best fits my needs. Here is the thing, should I do only 2 classes a day and try my best to get close to 100% in my classes, or...
  30. P

    Energy balance from mechanical to electrical energy

    A mass is winded via string aroung a flywheel and allowed to fall a specific height before detachement. The flywheel is connected to a small DC motor via gears and starts generating electricity once the mass is allowed to fall.. Now without the DC motor ( generator) the equation of energy...
  31. T

    Attempts to balance social life/ physics

    Recently, I've gotten into a kind of crisis mode. I am a third year undergraduate majoring in physics. Last semester, I've overloaded myself with graduate courses and dragged through it with good marks at the end. My social life was pretty much non-existent. I slowly realized that I cannot...
  32. C

    Charge balance in the universe?

    Hello, what is the assumed balance between neg, pos and nuetral charge in the whole universe? Does it balance out to nuetral? Ta Chris
  33. G

    Chemical Engineering Mass Balance with matrix

    Homework Statement Ethane reacts with chlorine to make ethyl chloride and hydrogen chloride, and ethylene reacts with hydrogen chloride to form ethyl chloride. C2h6+ Cl2 > C2H5Cl + HCL C2H4 + HCl > C2H5Cl I post an image of flow chart and rest of description Based on my reading...
  34. T

    Calculate the % fan shaft is out of balance

    Homework Statement A fan loses an 11 gram piece 460mm from the shaft center. It rotates at 1000 RPM and cannot operate if the shaft is out of balance by more than 8%. Prove whether or not the fan can still operate Homework Equations Fc = mwr2 The Attempt at a Solution I have...
  35. T

    Calculate the % fan shaft is out of balance

    Homework Statement A fan loses an 11 gram piece 460mm from the shaft center. It rotates at 1000 RPM and cannot operate if the shaft is out of balance by more than 8%. Prove whether or not the fan can still operate. Homework Equations Fc = mwr2 The Attempt at a Solution I have...
  36. C

    Solving the Puzzle: How Does the Magnetic Field Affect Balance?

    Well I have the answer already, just don't understand it. A rectangular coil of wire is hung from one arm of a balance, as my beautiful diagram will show. With the magnetic turned off, a Mass M is added to the pan on the other arm to balance the weight of the coil. When a constant magnetic...
  37. H

    What's the purpose of thrust balance in Turbo Fan Engine?

    What's the purpose of "thrust balance" in Turbo Fan Engine? I'd like to know about the purpose of the Thrust balance system in commercial Turbo Fan Engine. Can you tell me the major role of thrust balance system? Also, the relations between thrust balance system and compressor / main bearing...
  38. R

    Help distance from pivot x to balance beam?

    Help! I've spent 2 days now trying to do this now and it driving me mad. http://www.emvino.com/pivot.jpg Given the following diagram, what distance from the pivot (x) is required to balance the beam? any help would be highly appreciated. Thanks
  39. T

    How to balance chemical equations with multiple elements?

    Ca_3(PO_4)_2 + H_3PO_4 -> Ca(H_2PO_4)_2 i got the same problem with this one MgO + H_3PO_4 -> Mg_3(PO_4)_2 + H_2O each time i balance one element i get the other which i balance before to be dis balanced what is the general way of solving such things ??
  40. DaveC426913

    Is Balance Considered a Sixth Sense?

    The senses are, in a nutshell, methods by which we gather information about the outside world. I've never understood why balance is not considered a sixth sense. It is a way that we gather information about the outside world that is unique from the other senses. It tells us which way is down...
  41. T

    Detecting Mass Changes with a Hydraulic Balance

    A hydraulic balance used to detect small changes in mass is shown in Fig. 9.31. If a mass m of 0.40 g is placed on the balance platform, by how much will the height of the water in the smaller, 1.0 cm diameter cylinder have changed when the balance comes to equilibrium? please give a detailed...
  42. A

    How Does a 10% Reduction in Sun's Power Affect Earth's Temperature?

    Homework Statement 1. If the Sun’s power is reduced by 10%, what would the temperature of the Earth be? Assume an albedo of 0.3 and do not consider greenhouse effects. Homework Equations There is an equation here in the book but it makes no sense to me The Attempt at a Solution...
  43. M

    Sol'n: Find Force P to Balance Weight of Blocks A and B

    This is just a problem from my midterm, and I was wondering if I did it correctly Homework Statement Weight of block B is 15kN, weight of block A is 25kN. Find force P that has to be applied to keep the system in equilibrium in tension in the cable Homework Equations \sumFx=0...
  44. N

    Three bys trying to balance a seesaw

    Three boys are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board L = 3.52 m long, see figure below. Two boys are already on either end. One has a mass of m1 = 53.0 kg, and the other a mass of m2 = 32.8 kg. How far from the...
  45. B

    Energy Balance on a pump with sea water

    My main question in order to solve this problem is...should kinetic energy be neglected? Ok, so here's the problem question: Sea water with a density of rho = 1025 (kg/m^3) flows through a pump of 0.21 (m^3/s). The pump inlet is 0.25 (m) in diameter. At the inlet the pressure is -0.15 (m of...
  46. B

    How Much Chemical Solution Is Needed for Proper Dosing in Water Treatment?

    Hello everybody.. I have aquestion and hope to get help..please bear with me and try to finish reading my question.. Thank u very much for your time. My question is I have a pilot plant filter.. and i need to add some chemicals to the raw water before entering the filter..say for...
  47. I

    12 coins and a balance beam scale

    You are given 12 coins that are identical except that they are numbered and you are told that one coin is odd-weighted, being either slightly lighter or slightly heavier than anyone of the remaining eleven. You are given a worktable and a balance beam scale. You may use the scale three times...
  48. F

    How to build a simple wind tunnel force balance?

    I have constructed a wind tunnel with approximately 15 x 15 in. cross-sectional area test section. Where can i get some ideas/plans to build a simple force balance that can measure lift and drag forces simultaneously? Currently I'm using a single-axis button load-cell setup to measure...
  49. M

    How many "C" does it take to balance one "A"?

    How many "C" does it take to balance one "A"? A A A A A B B B B A C C ------------- ------------ -------- --------- l l...
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