Calculation Definition and 1000 Threads

A calculation is a deliberate process that transforms one or more inputs into one or more results. The term is used in a variety of senses, from the very definite arithmetical calculation of using an algorithm, to the vague heuristics of calculating a strategy in a competition, or calculating the chance of a successful relationship between two people.
For example, multiplying 7 by 6 is a simple algorithmic calculation. Estimating the fair price for financial instruments using the Black–Scholes model is a more complex algorithmic calculation.
Statistical estimations of the likely election results from opinion polls also involve algorithmic calculations, but produces ranges of possibilities rather than exact answers.
To calculate means to determine mathematically in the case of a number or amount, or in the case of an abstract problem to deduce the answer using logic, reason or common sense. The English word derives from the Latin calculus, which originally meant a small stone in the gall-bladder (from Latin calx). It also meant a pebble used for calculating, or a small stone used as a counter in an abacus (Latin abacus, Greek abax). The abacus was an instrument used by Greeks and Romans for arithmetic calculations, preceding the slide-rule and the electronic calculator, and consisted of perforated pebbles sliding on iron bars.

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  1. Mark Hamil

    MCNP Cylindrical Phantom Calculation Help

    I'm new to mcnp and trying to perform this calculation, if anyone can provide some feedback to see if I'm even going in the right direction that would be much appreciated. The geometry is correct with only 1 transverse, the issue I am having is making sure my data block is correct and how I am...
  2. J

    B Naive Calculation of the Age of the Universe

    I have marked this as high school level, although I am studying an undergraduate general relativity course, and just want to get some basics right. Whenever I look for a 'cheap and dirty' method of calculation for the age of the universe, with a Hubble constant not changing with time, I am met...
  3. Epoch

    Electricity: voltage calculation in serial

    Homework Statement Calculate the voltage U. The voltmeter gives a value of 80V. The Attempt at a Solution [/B] 3RI + 4RI - U = -80 How can I create a System of Linear equations if I have only one equation? Do I miss something? My answer sheet says U = 150V.
  4. W

    Calculation for a radial supply system

    Homework Statement [/B] Im working through my HNC with the answers but i do not know how they have come to the numbers below.Total load = 1.5/-60 degrees + 2.3/-18 degrees. =(0.75−j1.3)+(2.19−j0.71) 2. Homework Equations . Not sure yetThe Attempt at a Solution I understand how they have...
  5. W

    Voltage drop calculation for radial supply system

    Voltdrop calculations are made as shown below. Total loadLine currentI=1.5/−60∘⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯+2.3/−18∘⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ =(0.75−j1.3)+(2.19−j0.71) <<< (How to get to these numbers only from above??) =(2.94−j2.01 )=3.56/−34.4∘⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯MVA
  6. Epoch

    Electricity: shunt calculation for ammeter

    Homework Statement We have an ammeter with 20Ω resistance and a range of 10mA or 0.01A. The different ranges are 3000mA, 300mA, 30mA. Calculate the shunt resistors a, b and c. Homework Equations The Attempt at a Solution Ia = 0.01A ; Ra = 20Ω ; I = 0.03A Ua = Ia ⋅ Ra = 0.01A ⋅ 20Ω =...
  7. B

    MHB Why Do I Get Negative Value Integrating y=-50e^-5x?

    Hello! And Good day! I just want to ask why do I keep getting a negative value whenever I take a definite integral of function $$y=-50e^{-5x}$$ the graph is shown as the first image. If you look at the graph of the integral of "y" there's no traceable negative value on the graph. Why is that...
  8. Epoch

    Electricity: ammeter range calculation

    Homework Statement [/B] An ammeter has a range of 10mA or 0.01A and a resistor of 20Ω. Three shunts are used: R1 = 4Ω ; R2 = 2Ω ; R3 = 4Ω What will the different ranges be (m3, m2, m1)? The Attempt at a Solution [/B] I started by calculating the voltage: Ua = Ia ⋅ Ra Ua = 0.01A ⋅ 20Ω =...
  9. Euler2718

    I Hypergeometric Distribution Calculation in Libreoffice

    Given this libreoffice command: HYPGEOM.DIST(X; NSample; Successes; NPopulation; Cumulative) >X is the number of results achieved in the random sample. >NSample is the size of the random sample. >Successes is the number of possible results in the total population. >NPopulation is the size...
  10. G

    Calculation of heat created during compression

    Homework Statement Hello, I have a task to make a heat balance of the evaporator. To do this, I was told to carry a few smaller energy balances in different parts of the evaporator. One of the things I had to calculate was the heat generated during steam compression. -steam is entering...
  11. F

    Carry over factor in beam calculation -- confusion

    Homework Statement I have several question regrading with this post . 1.) For BC and CB , we could see that it's far end pinned / roller supported , so , shouldn't be the K = (3/4)(EI / L ) ? 2.) I don't understand how the carry over factor works (in the second picture) Homework...
  12. Ridzuan

    What is the formula for calculating moment of inertia in RTG crane design?

    Hi guys... appreciate if somebody can help me on the design calculation of the RTG crane... I am stuck to understand the following formulas, used by MITSUBISHI to calculate as follow: 1. Moment of inertia for hoisting = [Lifting weight (kg) x Lifting velocity^2 (m/min)^2] / [π^2 x motor rpm^2]...
  13. rbsann

    Electric field calculation doubt (dipole)

    Hello all, i am having a hard time with EM, specially with the most simple concepts that i don't seem to grasp at all and the simple exercises that should be quite simple to solve. So the question is. ( i will omit the constant (1/4pieo) for practice sake When i calculate the eletric field...
  14. R

    How Do I Calculate the Change in Head When Reducing Discharge Line Size?

    I have a pump running at 400rpm with 8" inlet and outlet with head 30 ft 500 gpm. Now I am planning to reduce the discharge line to 6" . Assuming the flow rate and speed constant the velocity in the pipe will increase. How do I calculate the change in head?
  15. Asmaa Mohammad

    Calculation of the least value of PD needed to produce x-rays

    Homework Statement [/B] In my excercise book, I was given a typical diagram as that in Fig (6-7) above. And the problem statement says: The diagram presents the x-ray spectrum produced by Coolidge tube. Determine the least potential difference needed to produce the characteristic radiation...
  16. T

    MHB Probability calculation with Bayesian Networks

    Given this base data (taken from Graphical Models )$P(C) = 0.5$ $P(\lnot C) = 0.5$ $P(R | C) = 0.8$ $P(R | \lnot C) = 0.2$ $P(\lnot R | C) = 0.2$ $P(\lnot R | \lnot C) = 0.8$ $P(S | C) = 0.1$ $P(S | \lnot C) = 0.5$ $P( \lnot S | \lnot C) = 0.5$ $P( \lnot S | C) = 0.9$ $P(W | \lnot S, \lnot...
  17. V

    PNP Transistor voltage calculation

    For the B) part, I don't get why is it that for calculating voltage between collector an the emitter (Vce) I take into account diode on base (0.7V), whereas for part A) it's ignored? Why is Vce in part A and part B are calculated differently? Why is it that in part A voltage of 0.7V isn't taken...
  18. D

    MHB Gravity Calculation: Calculate Accel Gravity

    public class GravityCalculation { public static void main (String [] args) { double G = 6.673e-11; double M = 5.98e24; double accelGravity = 0.0; double distCenter = 0.0; distCenter = 6.38e6; /* Your solution goes here */...
  19. A

    Synchronous Machine Voltage Curves & Torque Relation to Armature Current

    Hello everyone Im new on the forum and I just discovered what are sync machines... I have really basic question what I still cannot figure out.. I did some experiments with motor for different field currents and torques. In the result I measured armature currents and did V curves. But next...
  20. H

    Design Calculation and Sizing of a 500KVA Transformer

    I want to design the installation of a 500KVA Distribution Transformer to supply a neighborhood in Nigeria. The Existing National Grid voltage is 11KV. I want input from you guys to add to my sizing/costing. Inputs: 1. Sizing of XLPE Cable 2. Sizing of Transformer HV Protection ( Current Rating...
  21. A

    How Do I Calculate BTU Needs for Cooling an Enclosed Space?

    Hi all. I'm working on a small project and could use help. I have an 3/8" thick aluminum box that is going to be placed outside. The dimensions of the box are 33"x33"x33" and inside the box there is a 3/4 air gap on all sides that is covered with 1/8" hdpe platic walls. There will also be a...
  22. P

    Moment of Inertia Calculation for Offset Mass

    Ran into a bit of a dilemma. I'm having some problems calculating the moment of inertia for an offset weight configuration. Please see the attached drawing. Basically this offset weight will be turning around an axis as labeled in the drawing. Any help would be greatly appreciated
  23. K

    MHB How to Calculate Equilibrium Price with Given Information?

    I do not understand how to calculate the equilibrium price of an object. Say i have the following information how would i set up the information to solve for the price? Price of (Insert the name of your good or service) Quantity Demanded Quantity Supplied (in this order.) \$7.99, 35, 21...
  24. C

    I Control Moment Gyro - MOI calculation & units of measure

    Hi all, I am not a physics major and have spent some time learning via the university of Google. I would really appreciate a second set of eyes on what I am calculating and tell me if I am correct, or if I have done something wrong along the way. I am trying to calculate MOI and need results...
  25. T

    Analytical Chemistry Concentration Calc Question

    A lab mate and I are discussing how to properly interpret LCMS results and coming to different conclusions. We are taking a solid food sample and extracting it with 50:50 acetonitrile/water to determine the concentration of melamine in the food sample. Standard solutions were made that range...
  26. G_Mallard

    Not sure Exactly what Pressure I am Solving for in this Form

    Hello all, I am posting this question here in this thread and not the homework thread since it is not a homework problem but something I have been working on myself. Let us imagine a fluid flowing through a pipe, we can measure pipe diameter and fluid velocity. The density of the fluid is also...
  27. A

    I Gravitational time dilation calculation near a Black Hole

    Hello to everyone! I am trying to understand in practice the Gravitational Time Dilation by calculating the time distortion near the supermassive black hole Sgr A* in our Galactic Center. According to Einstein's Theory of General Relativity, the time distortion near a black hole is calculated...
  28. K

    Chain Conveyor Speed Calculation

    Okay this has has been driving me crazy. I would like to know how a conveyor speed can be calculated on the basis of chain pitch, sprocket PCD & no. of teeth and output RPM of gearmotor. So here is a practical example I'm having to solve at the moment: I have to drive a conveyor at a speed of...
  29. S

    FEA Hand Calculation Validation

    I have ran an FEA analysis on part screenshot below. I wanted to do some hand calculations to validate the results. What formula should I use to calculate the stress?
  30. r_prieto5

    How Do You Calculate the Force of a Solenoid to Lock a Neodymium Triangle?

    Hello everyone, So for a personal project I want to calculate the force necessary for a solenoid (electromagnetic coil) to keep a permanent magnet triangle locked diagonally up and down at the same time so that it does not move in any direction. I need to know the values for coil thickness...
  31. T

    What's Wrong with My Monte Carlo Calculation of π Using Fortran?

    Hi guys, I am having trouble seeing where I have actually gone wrong with my code. If I run the code I am getting approximation of 12 as my lowest is way to big. But I am really struggling to find where I have gone wrong. Any advice would be appreciated. PROGRAM assign_10_1 IMPLICIT NONE...
  32. J

    I How much force is exerted at 200 PSI with a panel size of 12 x 18?

    Someone questioned my calculation for force: 200 PSI Area: panel dimensions are 12" x 18" what is the calculated force in pounds
  33. W

    Simple bending moment calculation

    Hi, Really need some help with figuring out the max bending moment in the diagram shown below (I'm aware this is extremely simple but time and stress appear to have the better of me, so any help is appreciated) I think I've worked out the reactions at each support by doing m=wL as the...
  34. M

    Noise Calculation with the Equipartition Theorem Method?

    Anybody know how calculate the noise with equipartition theorem method? For a simple RC one order filter. The noise charge across the capacitor is Q. we have 1/2*k*T=1/2*C*(Q/C)^2 For a more complicated network as below. Can you help me on how to calculate the total noise charge or voltage...
  35. H

    B Why is \( (1 + \sqrt{-5}) \times (1 - \sqrt{-5}) \) Equal to 6?

    Why is (1 + sqrt(-5) x (1 – sqrt(-5)) equal to 6?
  36. Arman777

    Electric Field Calculation (Square Wire)

    Homework Statement Find the electric field a distance ##z## above center of a square loop of wire,each of whose sides has length ##l## and uniform charge per length ##λ## Homework Equations ##dE=\frac {1} {4πε_0} dq \frac {1} {r^2}## (magnitude) The Attempt at a Solution...
  37. T

    A Scientific method to calculate the time limits of a task

    Is there a way to estimate the upper limit and lower limit of time for doing a work? Suppose we are learning a page of facts and want to estimate the upper and lower limit of time taken to do so. If we start estimating the time we will find that the pages are learned in some variable periods of...
  38. I

    I Why use the mass of 2 electrons in calculation of Q for beta

    When dealing with a beta ^+ decay in the calculation of the disintegration energy Q, one includes the mass of 2 electrons. But the output result is 1 electron in the fundamental reaction: p => n + ( e^+ ) + v Where the neutron n has a neutral charge and the neutrino v has Z = 0. So why does...
  39. H

    6D calculation of spring-forces/moments

    Hi, I'm a student in electrical engineering and I'm writing my master thesis at the moment. Ironically I'm now confronted with the deformation of springs. I'm not a physics (!) but I think and hope that you may can help me. Simple push and pull forces are not the problem. I need to calculate...
  40. O

    I Calculation of negative energy density in a Casimir cavity

    Hello, I would like to know how to calculate the negative energy density in the region between two Casimir plates, given a distance between two parallel plates. Thanks, much appreciated!
  41. S

    MHB Integer Arithmetic for Precise Calculation of Irrational Numbers

    I have authored documents of 40 years of computer software development with a mind to collect them into a publication at some point. They have been built around several software topics but mathemetics is a favorite of mine. I find a point of inspiration and write a piece of software around it...
  42. Safinaz

    A Calculation of ## b \to s~ l^+l^− ## penguin diagram

    I'd like to calculate the matrix element amplitude for## b→s l^+l^−## penguin diagram mediated by Z boson or the photon , like : These calculations are made of course from many time ago, so if anyone has a good reference for such calculations, because it's my first trail in a penguin loop ...
  43. Peter de Haan

    Calculation of friction stresses between 2 materials

    Dear All, I am looking for a method to calculate the friction stresses created in 1 mm thick, fully supported, slide of soda-lime silica glass. In this experiment a 1/4" ball bearing of various metals is being translated over the glass surface under a constant load of 2000g. The glass slide is...
  44. A

    Opamp RC-circuit -- Capacitor time constant calculation

    Homework Statement for the opamp circuit give in the figure, find Vo(t) for t > 0 the figure is attached. Homework Equations I know that tau = R * C that is the time constant of a capacitor discharging is equal to the product of the resistor that it discharges through and its capacitance.The...
  45. cheapstrike

    Calculation of torque to stop a wheel.

    Homework Statement A wheel of moment of inertia 5×10-3kg-m2 is making 20 rev/s. Find the torque required to stop it in 10s is (A) 2π×10-2Nm (B) 2π×102Nm (C) 4π×10-2Nm (D) 4π×102Nm Answer - (A). Homework Equations ω=2πƒ (ƒ=frequency) Power (P) = Γω. P = W/t. W = ΔK.E. = (1/2)Iω2. The...
  46. V

    MeOH:H2O Freezing Point Depression Calculation Issue

    I noticed that my windshield washer fluid has methanol in it to reduce the temperature of which it freezes. I know it freezes at approximately -28°C which gives us a concentration of MeOH at approximately ~30% by weight. However, when I try to calculate the required methanol using the mSolute...
  47. M

    Charged Particle in Magnetic field calculation

    Homework Statement Basically having a problem when trying to theoretically calculate the mass of alpha particle in a charged field. r is the unknown radius of curvature m = mass of an alpha particle (6.646 *10^-27 kg) v = velocity of an alpha particle immediatly after decay (1.381 *10^7 m/s)...
  48. brainbaby

    Calculation of inductances for a coupling network

    Hi guys As per text... To match 10k with 500Ω a coil is used as an autotransformer tapped at point 3...now for a certain bandwidth and centre frequency what should be the value of Lp and Ls...?? How do I calculate it..?? and if the value of Ls and Lp is found out to be low then how could they...
  49. T

    How Does Winkler's Method Calculate Dissolved Oxygen in Water?

    We were measuring the amount of O2 dissolved in water by Winkler's method. Here's a link to the procedure and reactions: http://file:///C:/Users/SANJUKTA/Desktop/Downloads/Capture.PNG http://dropcanvas.com/6su7m/1 (The same is attached to this post) We had to use this formula: c(O2)...
  50. N

    Order of magnitude calculation

    I am confused! . In some books it is written that if the multiplier is less than 3.162 , the order of the magnitude of the number is the power of the ten in scientific notation , while in some books it is written less than 5 . What is right? Help!
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