Science6 min
Coulomb's Law — Formula, Units and Worked Examples
Coulomb's law describes the force between electric charges. Learn the formula, the constant k, and a step-by-step numerical example for 2026.
Articles tagged “physics”
Science7 min
Entropy — Basics, Formula and Examples in Physics 2026
What is entropy and how do you calculate it? We explain the second law of thermodynamics, Boltzmann's formula, and entropy using simple physical examples for 2026.
Science6 min
Ohm's Law Explained — Formula, Examples and Practical Applications
Understand Ohm's Law with clear examples, the V=IR formula and real-world applications in electronics and electrical engineering. Ideal for students.
Science6 min
Ohm's Law — How to Calculate Voltage, Current and Resistance
Ohm's law in practice: the formula U = I × R, how to find voltage, current and resistance. Worked numerical example in SI units plus power formulas.
Science6 min
Density — How to Calculate It from the Formula, with Examples
How to calculate the density of a substance: the formula ρ = m / V, SI units, converting kg/m³ to g/cm³, and a step-by-step numerical example.
Science6 min
Kinetic Energy — Formula and Worked Examples
The kinetic energy of a body: the formula Ek = ½mv², the unit joule, the effect of mass and speed, and a step-by-step numerical example in SI units.
Science6 min
Force and Acceleration — Newton's Second Law of Motion
Newton's second law of motion: the formula F = m × a, the unit newton, how to calculate force, mass and acceleration, and a worked example in SI units.
Science6 min
Pressure — How to Calculate It from the Formula p = F / S
How to calculate pressure: the formula p = F / S, the unit pascal, the effect of force and area on pressure, and a step-by-step numerical example in SI.
Science6 min
Average Speed — How to Calculate It from the Formula v = s / t
How to calculate average speed: the formula v = s / t, the units m/s and km/h, unit conversion, and a numerical example with distance and time.
Science7 min
The Doppler Effect Explained — Formula, Examples and Calculator
What is the Doppler effect, how does the frequency-shift formula work and where is it used? From ambulance sirens to astronomical red-shift and medical ultrasound.
Science7 min
The Doppler Effect - How It Works and How to Calculate It
The Doppler effect is a change in wave frequency observed by a moving receiver or source. Learn the formula, real-life examples, and how to calculate it.
Science7 min
Buoyant Force (Archimedes' Principle) - Formula, Examples, and Calculator
The Archimedes buoyant force determines whether an object sinks or floats. Learn the formula F = ρ x g x V, Archimedes' principle, and its applications in engineering and medicine.
Science8 min
Ideal Gas Law Calculator — PV=nRT Formula and Examples
Master the ideal gas law PV=nRT with a step-by-step calculator guide. Includes formula derivations, unit conversions, real gas corrections, and solved chemistry problems.
Science7 min
The Ideal Gas Law (PV=nRT) — How to Calculate It and Applications
The ideal gas law PV=nRT step by step: what the variables mean, how to calculate pressure, volume and temperature, and examples of applications in physics.