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Online calculator: Chemical equation balancer

Details: Calculators used by this calculator. Chemical compound molar mass. Gaussian Method for system of linear equations with any number of variables. Least Common Denominator. The greatest common divisor and the lowest common multiple …

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Online calculator: Huffman coding

Details: In computer science and information theory, Huffman coding is an entropy encoding algorithm used for lossless data compression. The term refers to using a variable-length code table for encoding a source symbol (such as a character in a file) where the variable-length code table has been derived in a particular way based on the estimated

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Online calculator: Quantity of heat

Details: Let's start with couple of definitions: Heat is the amount of energy flowing from one body of matter to another spontaneously due to their temperature difference, or by any means other than through work or the transfer of matter. Historically, many energy units for measurement of heat have been used. The standards-based unit in the International System of Units (SI) is the joule (J).

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Online calculator: Index of Coincidence

Details: It took science into a new world. 1. Having the definition above, one can devise the formula for IOC. Let be the length of the text. Let be the size of the alphabet. Let be the i-th letter of the alphabet. Let be the number of occurrences of i-th letter in the text. Then the probability of having two selected is.

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Online calculator: One's complement, and two's complement

Details: This online calculator displays one's complement and two's complement codes for the entered negative integer. In fact, this calculator displays binary code for any integer number, but the code depends on a sign. For positive integers, the calculator displays their binary representation.

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Online calculator: Dilution calculator and problems solver

Details: These online calculators can help with dilution problems. Generally, in dilution problems, you either dilute a solution or mix two solutions with different concentrations. So, the first calculator below can solve dilution problems, and the second calculator below can solve mix problems. Theory and formulas can be found below the calculators.

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Online calculator: Alcohol amount in the aqueous alcohol

Details: As long as this topic was not connected to science, beverage strength was determined with interesting methods. For example, for a long time, the most common type of strong wine in Russia was the so-called polugar (38% of alcohol). The way of proving the quality of Polugar was simple - set it on fire, and it will burn until half of its amount

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Online calculator: Decision tree builder

Details: Decision trees. A decision tree is a flowchart-like structure in which each internal node represents a "test" on an attribute (e.g. whether a coin flip comes up heads or tails), each branch represents the outcome of the test, and each leaf node represents a class label (decision taken after computing all attributes).

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Online calculator: Information gain calculator

Details: Information gain and decision trees. Information gain is a metric that is particularly useful in building decision trees. A decision tree is a flowchart-like structure in which each internal node represents a "test" on an attribute (e.g. whether a coin flip comes up heads or tails), each branch represents the outcome of the test, and each leaf node represents a class label (the decision …

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Online calculator: Hill cipher

Details: Hill cipher. This calculator uses Hill cipher to encrypt/decrypt a block of text. According to the definition in wikipedia, in classical cryptography, the Hill cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which it was practical (though barely) to

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Online calculator: Chemical equation balancer

Details: Chemical equation balancer. This online calculator balances equations of chemical reactions using algebraic method. The last two are used for redox reactions. This chemical equation balancer uses the algebraic method – which is usually quite complex for manual calculations, however, it fits the computer program perfectly.

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Online calculator: Shannon Entropy

Details: Shannon Entropy. This online calculator computes Shannon entropy for a given event probability table and for a given message. In information theory, entropy is a measure of the uncertainty in a random variable. In this context, the term usually refers to the Shannon entropy, which quantifies the expected value of the message's information.

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Online calculator: Time scales

Details: Modern science can measure such a short process with high accuracy. The SI unit of time is the second. Today, the second is defined very precisely by the cesium atom periodic oscillations. Atomic clocks are the most accurate time and frequency standards known at the moment. In the past, people did not have such precise instruments and deep

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Online calculator: Flow Rate and Pressure Drop of Gas

Details: Material Absolute roughness (ft) Drawn brass: 0.000005: Drawn copper: 0.000005: Commercial steel: 0.00015: Wrought iron: 0.00015: Asphalted cast iron: 0.0004

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Online calculator: Digital image size in pixels and photo

Details: This article is about the relation between an image size in pixels and a photographic print size. First, it recommends the photographic print size for given digital image dimensions in pixels. Second, it finds the resulting pixels per inch value for a printed digital image with known linear and pixel dimensions.

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Telecom History – Interactive Telecom History with

Details: The art and science of communicating over a distance by telephone, telegraph and radio. The transmission, reception and the switching of signals, such as electrical or optical, by wire, fiber, or electromagnetic means. Newton's Telecom Dictionary.

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Details: Gives a vertical object shadow length for given coordinates and time. Also calculates shadow growth during whole day. This simple online calculator gives a vertical object shadow length for a specified day and geographic coordinate. The calculator uses Sun position algorithm to calculate sun altitude. a - the angle between Sun and horizon.

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Online calculator: LL1 parser generator

Details: Becus BNF CFG compiler theory Computer Science Context Free Grammar EBNF Naur parser programming PLANETCALC, LL1 parser generator Anton 2020-11-03 14:19:33

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Online calculator: Molar volume

Details: The calculation uses the ideal gas equation: The ideal gas equation is a good approximation for many common gases. And, for a given temperature and pressure, the molar volume is the same for all ideal gases, and is known to the same precision as the gas constant: R = 0.082 057 338(47) L atm K−1 mol−1, that is a relative standard uncertainty of 5.7×10−7, according to the …

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Online calculator: Random matrix generator

Details: Random matrix generator. This online calculator generates a random matrix with specified parameters like a dimension, a range of values, a type of numbers.

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Online calculator: 2D Bin Packing Problem Solver

Details: In fact, this is a Two-Dimensional Rectangle Bin Packing problem. The calculator will try to find the best layout it can, but it does not guarantee the optimal solution. For science details, refer to the theory section below the calculator.

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Calculatrices en ligne : Las étude : Chimie

Details: Ce calculateur en ligne peut calculer la concentration molaire (molarité) d'un soluté ou le volume d'une solution avant ou après la dilution. Ces calculateurs en ligne calculent le pH d'une solution. Il y a deux calculateurs - un pour les bases et acides forts …

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Online calculator request: Calculator for testing prime

Details: Department of Computer Science & Engineering Indian Institute of Technology Kanpur Kanpur-208016, INDIA Email: {manindra,kayaln,nitinsa}@iitk.ac.in Abstract We present an unconditional deterministic polynomial-time algorithm that determines whether an input number is prime or composite. 1 Introduction

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Online calculator: Rail fence cipher

Details: The rail fence cipher (also called a zigzag cipher) is a form of transposition cipher.A transposition cipher involves the rearranging of the letters in the plain text to encrypt the message. In the rail fence cipher, the plain text is written downwards and diagonally on successive "rails" of an imaginary fence, then moving up when we reach the bottom rail. When we reach the top rail, …

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Online calculator: Molarity calculator

Details: Molarity. Let's recall some definitions: A solution is a mixture where the ratio of solute to solvent remains the same throughout the solution (a homogeneous mixture or mixture with uniform composition). The solvent is the chemical that is present in the larger amount, and the solute is the chemical that is present in the smaller amount.. Molarity or molar concentration is the …

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Online calculator: Matrix triangulation calculators

Details: Matrix triangulation calculators. Matrix triangulation using Gauss and Bareiss methods. Below are two calculators for matrix triangulation. The first uses the Gauss method, the second the Bareiss method. A description of the methods and their theory is below.

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Online calculator: Kinematic Equations for Constant

Details: This kinematics calculator will help you to solve constant acceleration problems using kinematic equations. As you may know, there are two main kinematic equations of motion for uniform, or constant, acceleration. Thus, we have five parameters of motion: initial velocity V₀, final velocity V, acceleration a, time t, and displacement, or

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Calculatrice en ligne: Equilibre d'équation chimique

Details: #chimie #science Chimie chimique élimination équation équilibre équilibrer Gauss réaction système d'équations linéaires PLANETCALC, Equilibre d'équation chimique Timur 2020-11 …

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Online calculator: Substitution cipher decoder

Details: This online calculator tries to decode substitution cipher without knowing the key. It uses genetic algorithm over text fitness function to break the encoded text. Note that you may need to run it several times to find completely accurate solution. The calculator logic is …

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Online calculator: List intersection

Details: So, this calculator applies regular expression to each line, extract first match group and memorizes it. Then it gathers statistics on each unique match group value, allowing you to intersect list and count similar values. Default list illustrates this. It have five "match one" strings, and two "match two" strings.

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Online calculators

Details: Yet another top-down parser generator. The calculator checks LL1 grammar correctness, parses a text using the grammar, shows FIRST, FOLLOW and FIRST PLUS sets, parsing tree and gives PLANETCALC parsing code. This online calculator generates a random matrix with specified parameters like a dimension, a range of values, a type of numbers.

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Calculatrice en ligne: Comparaison de tailles de chaussures

Details: P.S. La science évolue. La norme internationale ISO ISO 9407 "Système de mesures Mondopoint" a été adoptée en 1991. Ainsi, la taille de la chaussure est égale à la longueur et la largeur moyennes du pied en millimètres. 280/110, par exemple.

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Online calculator: Unique word calculator

Details: Text, which contains repeated words. Remove repeated words. Removes repeated words, starting from the second occurence. Show quantity. To display number of words near a word. Case sensitive. Exclude words. Words to be excluded from count. Unique word count.

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Online calculator: Numerical integration

Details: Numerical integration using Newton-Cotes formulas. Using Newton-Cotes formulas, the integration interval is divided by points x 1 ,x 2 ,x 3 ..x n into equal line segments. Integrand function is replaced by the Lagrange polynomials of various degrees, integration of which yields the numerical integration formulas with various degrees of accuracy.

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Online calculator: Binary Coded Decimal (BCD)

Details: Binary Coded Decimal (BCD) This online calculator converts decimal number to binary code in BCD notation and vice versa. When I finished the calculator Conversion of fractional numbers between numeral systems, I thought this was the final one on numeral systems. However, there appears the reason for another one.

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Calculatrice en ligne: Indice de Coïncidence

Details: La publication de Revierbank N°22, écrite en 1920, lorsque Friedman avait 28 ans, doit être considérée comme l'une des publications simples les plus importantes en cryptographie. Elle a amené la science vers un nouveau monde. 1. Avec la définition ci-dessus, on peut concevoir la formule pour l'IC. Prenons comme la longueur du texte.

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Online calculators

Details: Math Engineering #CSV #JSON #frequency #list #random #statistics #text 4-grams BNF Backus-Naur Becus CFG Computer Science Computers Context Free Grammar EBNF FIRST FOLLOW GET HSV HTML HTTP IT more

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Politique de confidentialité

Details: Cette politique de confidentialité décrit comment vos informations personnelles sont collectées, utilisées, et partagées lorsque vous visitez ou utilisez les services de fr.planetcalc.com (ci-après le « Site ») Nous recueillons et conservons différents types de données en fonction de la façon dont vous interagissez avec le Site.

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Online calculator: Apparent length from angular size

Details: Apparent length from angular size. This online calculator converts angular size of distant object to its apparent length, or, in other words, the length of obstacle needed to block that distant object from view, if obstacle placed at some known distance before our eyes. This is an additional calculator to the Angular size, linear size, and

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Online calculator: Volume of geometric shapes

Details: Calculates volume of geometric shapes: cube, prism, pyramid, frustum, cone, cylinder, sphere, ellipsoid. This article contains a collection of calculators for calculating geometric figures' volume. Calculation formulas primary source: Spiegel, Murray R. Mathematical Handbook of Formulas and Tables. Schaum's Outline Series in Mathematics.

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Online calculators

Details: Backus-Naur Becus CFG Computer Science Context Free Grammar EBNF FIRST FOLLOW Naur compiler theory grammar information technology parser. Search results

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