gophysics

A set of some of the most common physics formulas and constants.

Features

• It provides Physics formulas and constants for calculation porpuses.
• It allows to create some objects to simplify some calculations (see example).
• It also provides some common Math formulas in Physics.

Which formulas are contained?

Classical mechanics

• Force, Speed, Time, Work, Acceleration, Density, Intensity, Power, Momentum
• Potential Energy, Mechanical Energy, Kinetic Energy, Frequency, Doppler Effect
• Centripetal Acceleration, Centripetal Force, Pendulum Period, Projectile motion equations

Gravity

• Potential Gravitational Energy, Universal Gravitational Law, Gravitational Field
• Escape Speed

Fluids

• Stokes's Law, Hagen-Poiseuille's Law

ElectroMagnetism

• Ohm's Law, Capacitance, Voltage, Coulomb's Law, Energy Density
• Electric Field, Eletric Potential Energy Difference.

Termodynamics

• Gay-Lussac's Law, Net Heat Energy, Heat Flux, Eletric Field Flux, Joule Heating

Relativity

• Lorentz Factor, Relativistic Time, Relativistic Distance, Relativstic Mass, Relativistic Momentum
• Photoelettric Effect, Drift Speed.

How to use it

• Download the 'formulas' package to get the Physics formulas:

go get -u github.com/Gabri432/gophysics/formulas

• Download the 'constants' package to get the Physics constants:

go get -u github.com/Gabri432/gophysics/constants

• Download the 'mathem' package to get the Mathematical functions and constants of the library

go get -u github.com/Gabri432/gophysics/mathem

• Example of usage

package main

import (
    "fmt"
    "github.com/Gabri432/gophysics/constants"
    "github.com/Gabri432/gophysics/formulas"
)

func main() {
    fmt.Println(constants.C)   // Write a constant
    fmt.Println(formulas.Force(3, 4))   // Call a function
    myPlanet := formulas.PlanetBody{Mass: constants.EARTH_MASS, Radius: constants.EARTH_RADIUS} // Create a custom object
	fmt.Println(myPlanet.EscapeSpeed())  // Call object methods to ease some calculations
}

=== Output ===
299792453  
12 N       <<< When calling functions their output is the value and the measurement unit
11183.719071923773 m/s

• Using mathematical functions

import (
    "fmt"
    "github.com/Gabri432/gophysics/mathem"
)

func main() {
    fmt.Println(mathem.Pi) // Writing a constant
}

=== Output ===
3.1415926535

Project Structure

Folders

gophysics (main)

• gophysics.go, doesn't provide formulas, but other functions to simplify some actions.
• license, readme.md, readme.it.md, CHANGELOG.txt.

formulas

• classical.go, where all the Classical physics formulas are located.
• fluids.go, where all the Fluid formulas are located.
• gravity.go, where all the Gravity formulas are located.
• thermodynamics.go, where all the Thermodynamics formulas are located.
• electromagnetism.go, where all the Electromagnetism formulas are located.
• relativity.go, where all the Relativity formulas are located.

constants

• constants.go, where all the constants are located.

mathem

• constants.go, where all the mathematical constants are located.
• conversions.go, where all the main functions to make mathematical calculations are located.

Contributing to this project

• If you want to add a feature or making a fix check out this page explaining how to do it: Contributing to gophysics

Notes

• Formulas were taken from this italian book: Title - "Fisica Volume 1", Authors - ["Paolo Mazzoldi", "Massimo Nigro", "Cesare Voci"].