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.
Hello, I'm new to this forum. I hope I am submitting this to the right thread.
Just started physics and I am looking to get a little assistance
Homework Statement
A single loop carries 100mA and has an inductance of 100μH
Homework Equations
For air cored
L = μ0 * (N^2*A/length)
L = Nø/i...
Homework Statement
I am currently working as an intern in a research institute (I'm a 3rd yr undergrad) and my supervisor has asked me to create a simulation from a particular model - please see linked <http://journals.aps.org/prb/abstract/10.1103/PhysRevB.69.045202> or attached paper.
I...
I am building a shock damper for various weights which will be added at Mass D below. What I need to calculate is by how much would I need to turn my adjusters thus changing the angle of the spring, which in this case is 14.9 Kg rated, to allow for different weights to remain at a level...
I am attempting to complete a basic question involving molecular separation from Alonso & Finn "Fundamental University Physics" Second Edition, Chapter 2, Question 9. The Problem states
"Using the data in table 2-1 and A-1, estimate the average separation in molecules of hydrogen at STP (gas)...
I'm reading a journal article that implies the following but I can't see how it is done. I'll give 100 DogeCoin (or equivalent) to whomever can explain this in full.
Given that
V(A|B) = s
V(A) = r*s + w
B = A + C
and A & C are independent
so V(B) = V(A) + V(C) & V(C) = V(B) - V(A)
Then how...
Hi, I'm designing a gadget whereby I'm spinning a plastic propeller attached to a shaft which is attached to a 6V DC motor.
I'm required to do a basic energy analysis of the set-up. The kinetic energy of the propeller is 0.5*I*w^2 (w=omega=angular velocity).
Due to friction (air etc) then...
Homework Statement
I have a radiator through which water is passed at 90 degrees Celsius, the air speed as it passes through the radiator is 4ms-1. Water temperature difference between inlet and outlet of radiator is 28.33 K. Temperature difference between air before and after passing through...
Hi!
I'v been looking into this for way too long and have come to that point where nothing makes sense, hoping you guys could help me out! :smile:
Basically i have been given a net head of 20m and need to provide a micro hydro turbine with 5kW of power for over one minute. What i want to...
Homework Statement
Hello,
I'm looking for some help on how to perform some lab calculations. We recently did a lab on the Preparation of Geometric Isomers. We were preparing the Cis and Trans isomers of butenedioic acid, i.e Fumaric and Maleic Acid. The Maleic acid was done by reacting...
The purpose of the lab was to measure, and also calculate, the induced current in a disconnected coil, due to a second coil connected to a power supply. Involved magnetic fields and electric fields (I think.
For the purposes of this lab, the magnetic permittivity is 1.26*10-6, the number...
[b]1. I need to know the stress σ in the "y" direction.
[b]2. I will use σ=P/A equation.
[b]3. First (-2*10^6)N*0.4m=-0.8*10^6N
Then σ=P/A=(-0.8*10^6N)/(0.4m*0.02m)=-100*10^6Pa.
Is this corrects?
500lbs pressing down on two gears. Surface area of contact on one gear is 0.03125 inches squared.
I calculated pressure.
500lbs / 0.0625 = 8000psi being exerted onto the two gears' surface areas. One gear has 4000psi.
The gears' radius is 0.47 inches.
I calculated torque for an...
I am having a little issue with this problem, because when I do nodal analysis, I get the voltage of the node above the 5 kΩ resistor to be nearly 15 V. I am assuming all of the capacitors are saturated, and therefore act as open circuits. That means no current goes through the 20k or 30k...
Homework Statement
Concider the circuit shown below. Find the current iR flowing through the resitor. Find the power for each element in the circuit. Which elements are absorbing power?Homework Equations
Ohm's law: U = IR;
Kirchhoff's Current Law and Kirchhof's Voltage Law.The Attempt at a...
Hello,
I am trying to use some functions in MathCad given in my thermodynamics textbook to calculate thermodynamic properties. I attached the functions below.
I try using them and then I get an error saying too many commas
I just type in: MCPH(T1,T2;A,B,C,D)=
of course with numerical...
I'm making some calculations in logic and I'm using a lot of invented notation and I'm hoping that it will make philosophy more mathematical but I'm often afraid no one will care about my calculations or bother to learn how to do them. Are you ever afraid that no one will care about your...
Hi all i hope some one can help but i have a feeling there will be no easy calculations for this one:confused:
Im trying to calculate actual eddy current losses in 50hz mains transformers depending on lamination sizes and can't seem to find any info on the subject that's sub electrical degree...
Hi
I'm trying to make a lead screw in Creo which would be used to move a 400lb load linearly along the ground. This would be turned manually using a lever as shown in the pic (not the complete model). I have used a lead screw with a major diameter of 1 1/4 and determined the torque to move...
Hi, this is my first post on this forum, although I've often referred to many posts for random information, so thanks to all the people who dedicate time to other peoples questions, I greatly appreciate it. This is my first attempt for something like this and my knowledge of physics is very...
I am trying to come up with a formula to use with my labview program that will calculate wheel torque required to move a vehicle with some given variables. I have vehicle speed, vehicle weight, % grade or angle, tire diameter. I am trying to create a dynamometer that can determine proper motor...
Hi,
I've just got into my electrical engineering course and I need some help with a question of mine here.
During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel...
Hi all,
This is my first post. I was wondering what the effects of hydrodynamics are on water in regards to when you suck water out of a pipe leading to a barrel of water for example. When you then stop sucking the water from the pipe the water leaving the pipe then continues to pull water...
Gentlemen/Ladies,
Long time reader, first time posting. I have a few projects that I would like to get done, and I realized if I don't start getting them done, I never will. Heh.
I'm making mistakes calculating the resistors I would need for the following. I've done it 5 times now because each...
Hi everyone!
I am writing a paper in development/experimental economics concerning how household bargaining power (i.e. how much say the husband and wife has about how to spend household income) affect how much money is spent on children. I am going to conduct an experiment and is now in the...
Answer check please -- Moment of Inertia Calculations
For question 1 I got T=mnut * r pulley * gravity
For question 2 I got Isystem = 1/2 M(R23 + R24 + m (R21 + R22)
First day of physics lab and I just wanted to double check that these are correct.
Thanks.
Hello everybody,
I am working on the whole vehicle calculations, engine, brakes, suspension and engine simulation, using that software, take a look:
http://www.speed-wiz.com/calculations/engine-simulation/engine-simulation-conditions.htm
That software, you input the values at the top...
Hello! Finals are coming up in less than a week and I received some sample problems as review for the exam. I have my work layed out and a draft for it, but I would like some reassurance, if that's okay. :-)
Anyway, here is the sample problem:
You have been contacted by StM.org (Stop the...
Homework Statement
You wish to invest $10,000 over 10 years. Available to you are 5 different funds. At any time you may transfer money from one fund to another without penalty or transaction fee. To optimize the money you receive at the end of 10 years you realize that you want all of your...
Homework Statement
1. Convert (0.333...)4to base 10.
2. Convert (0.333...)10to base 4.
Homework Equations
For question 1:
I see this can be written as (3/4+3/42+3/43...)10
Can I just use the geometric formula and arrive at the answer 12/3=4 ?
But that doesn't match...
Homework Statement
I need to find i1+i2
Homework Equations
for i1=0.092<-98.86
i2=-4i1-j10/25=-4i1-0.4
i1=0.092<-98.86
x=rcosθ=0.092cos(-98.86)=-0.0142
y=rsinθ=0.092sin(-98.86)=-0.0909
i1=-0.0142-j0.0909
Therefor...
All of the related work is in the attachment. If you could please help it would be really appreciated. I've asked a bunch of people in my class, and they're confused also.
Thanks in advance!
Hello Everyone,
First time posting on this forum and looking forward to see what you guys can teach me! I am working on a program for a Raspberry Pi as a controller for a mechanical rotary and need some help from you physics enthusiast out there. Looking for some insight on the calculations...
Homework Statement
Given a vector field
F=-y/(x^2+y^2) i +x/(x^2 +y^2)
Calculate the curl of it the line integral of it in a unit circle centered at O
Homework Equations
The Attempt at a Solution
I calculated that the curl is 0 but the line integral is 2π. I don't think this...
Hi all, basically we're building a model bridge (30 grams) for a mechanical engineering project out of balsa wood and kevlar (for the strings). I've attatched a pdf file of the bridge design, although it doesn't show the strings.
We are wanting to do some basic load compression calculations...
I'm in a grade 12 university level chem class right now, and I'm getting a 72. I realized just today that the reason why I'm doing so poorly is because I'm good at calculations, but not questions that involve even more thinking.
For instance, one question gave us some information about...
I know the formula q = mcT and that's the only formula I was taught before assigned these questions (in bold).
1. What mass of iron would be needed to have it increase by 6 degrees with 300J of heat.
I am not sure what is meant by the increase of 6 degrees. How do you solve it without knowing...
Homework Statement
Hello
For a project I am designing a golf buggy and I am calculating conflicting information. The problem is as follows;
There is a drive shaft, A-B, 1.2m long.
There are bearings supporting the shaft 0.1m from the centre of the wheels (therefore 1m apart)
The...
Lab issue -- Please check my projectile launcher calculations
I am making a lab for a class I teach and my results aren't working out and I need another pair of eyes to see if my method is wrong (I apologize if this should go in homework, but it isn't a homework question so I thought it should...
Im just wondering what is the easiest way to deal with calculations where roots are involved?
For example how do you solve this one?
\frac{\frac{1}{2}}{1-\frac{\sqrt{2}}{2}}Thank you for replies!
I need some maths for a program to determine the exact (or as close as it can be mathed) bond energy of bonds from the first two rows of the periodic table S and P orbitals
all the websites I can find tell you what the average bond energy for a specific common bond is but that won't do for...
Hi!
I was wondering how you can calculate the distance to a planet simply by looking at images when it is at aphelion and perihelion? is it even possible? Thanks!
Homework Statement
I'm designing a tyre test rig for a university project to measure camber, slip angle etc.
An example of a test rig - http://www.ika.rwth-aachen.de/forschung/veroeffentlichung/1999/30.06.-02.07/im173g.gif
Although my test rig will be for an RC car tyres, so not quite the...
Hi there,
If I perform the following calculation in Excel:
=100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000+50
I get: 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000...
I have attachted the question as a picture:
my first attempt i calculated the voltage through the auxillary circuit to be 10V but i am confused of where the 0.5 A plays in this part, then i used nodal analysis to find the voltage input to the amplifier but up to that point i am confused of...
Homework Statement
I've put together a set of data containing hardness, cold work, stress and dimensions of aluminum and brass test samples. Before I distribute to my group, I wanted to ensure that it looked okay (units, graphs, etc.).
I needed to provide three graphs for each material...
Its a while I'm trying to understand [ http://arxiv.org/pdf/quant-ph/0108132v1.pdf ] but i have problem following its calculations.The part I have problem in now is the expansion in page 14,Eq. 50.Can anyone help me understand how that is done?
Thanks