Author: Tru Physics
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Speed
Introduction Speed is a fundamental concept in physics that describes how quickly an object moves. It is a scalar quantity, meaning it has magnitude but no direction. The SI unit of speed is the meter per second (). Velocity, is speed plus some direction. Velocity is a vector quantity. Average and Instantaneous Speed Average speed…
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Static Electricity
Introduction Static electricity is a phenomenon where electric charges build up on the surface of a material, typically an insulator or a non-conductor of electricity. This accumulation of charge remains in one area rather than moving or flowing away, thus termed as ‘static’. The effect is usually caused by friction, where contact between surfaces results…
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Strong Nuclear Force
Introduction The strong nuclear force, also known as the strong interaction or the strong force, is one of the four fundamental forces of nature. It is the force responsible for binding protons and neutrons together in atomic nuclei. The strong force is approximately 100 times stronger than the electromagnetic force, a million times stronger than…
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Superconductivity
Introduction Superconductivity is a quantum mechanical phenomenon where certain materials can conduct electric current with zero electrical resistance. This state occurs below a certain temperature, known as the critical temperature (). BCS Theory The underlying theory of superconductivity is the BCS theory (Bardeen–Cooper–Schrieffer theory). This theory explains superconductivity as a state in which electrons with…
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Superposition Principle
Introduction The principle of superposition is a key concept in physics and engineering, particularly in wave theory and quantum mechanics. It asserts that the net response at a given place and time caused by two or more stimuli is the sum of the responses that would have been caused by each stimulus individually. Superposition in…
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Temperature
Introduction Temperature is a fundamental concept in the field of thermodynamics. It is a measure of the average kinetic energy of the particles in a system, reflecting the intensity of thermal energy or heat. It is an important parameter in various equations and laws in physics, such as the ideal gas law, the laws of…
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Thermodynamics
Introduction Thermodynamics is a branch of physics that studies the relationships between heat, work, temperature, and energy. It describes how energy is transferred and transformed from one form to another, and it is governed by four fundamental laws: the zeroth, first, second, and third laws of thermodynamics. Zeroth Law of Thermodynamics The Zeroth Law of…
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Ultraviolet (UV) Radiation
Introduction Ultraviolet (UV) radiation is a type of electromagnetic radiation that lies beyond the violet end of the visible light spectrum and before X-rays. The wavelengths of UV radiation range from 10 nm to 400 nm, and they are typically divided into three types: UVA, UVB, and UVC. Planck’s Law UV radiation, like all electromagnetic…
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Unit Conversion
Introduction Unit conversion is a critical skill in physics and engineering. It involves changing the measurement of a quantity from one unit to another, maintaining the actual physical quantity constant, as measurement units may vary based on the context or standards used. Basic Principle The basic principle of unit conversion is using a conversion factor,…
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Vector Analysis
Introduction Vector analysis is a branch of mathematics that deals with quantities that have both magnitude and direction. Unlike scalars, which only have magnitude, vectors are essential in representing physical quantities such as force, velocity, and acceleration. Vector Basics A vector is often represented as an arrow with its length proportional to the magnitude and…