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GCSE Physics is CHALLENGING, there's no denying it! They make it tough to learn all of the theory, remember all of the rules, and apply everything to exam methodology.
That's why we've included videos, textbooks, flashcards, past papers, and more in this course.
We cover every GCSE Physics specification
In physics, energy is the ability to perform work. It can take many many forms, including potential, kinetic, thermal, electrical, chemical, radioactive, and others.
Learn about and revise energy stores and transfers and how to calculate energy changes with us!
Energy can be thought of as being stored in various’stores.’ It can’t be made or destroyed, but it can be moved around.
In physics, power is the amount of energy transferred or converted per unit time.
Energy is exchanged and some of that energy is dissipated whenever a system changes.
Efficiency in physics is a comparison of the energy output to the energy input in a given system
Energy resources are systems that can store enormous amounts of energy. Fossil fuels, nuclear fuel, biofuel, wind, hydroelectricity, geothermal, tidal, water waves, and the Sun are the principal energy resources accessible for producing electricity.
A basic definition of electricity is a form of energy that results from the flow of charged particles.
A flow of charged particles constitutes an electric current. Free electrons are the charged particles in metal conductors. Electrons are free to migrate from one ion to another, and an electric current is defined as a net movement of electrons in one direction.
The flow of electric charges is known as current. The potential difference provides the ‘push,’ while the resistance prevents the charges from flowing freely.
A resistor is a component that regulates the passage of electrical current in a circuit. Resistors are constructed of materials that make it difficult for electrical charges to flow through a circuit, such as copper or carbon.
All components in a series circuit are connected end-to-end, forming a single current flow route. All components in a parallel circuit are linked across each other, forming two sets of electrically common points.
In many parts of the world, it is the type of electrical power that is distributed to homes and businesses via the electric grid.
The quantity of energy moved or converted per unit time is referred to as power in physics.
Chemical energy in the fuel in power plants, for example, is transferred from one store to another by all electrical equipment.
The grid is a particularly efficient means of transferring electrical energy. When a cable’s currents are higher, more energy is wasted to the environment via heating.
Charged particles are transmitted from one body to another in static electricity, which is a well-known electric phenomenon.
The electric force per unit charge is defined as the electric field. The field’s direction is assumed to be the same as the force it would exert on a positive test charge.
The particle theory of matter is a model that describes how particles in a substance are arranged and move. The model is used to explain solids, liquids, and gases’ physical properties.
The density of a material is defined as material mass per unit volume and designated by the symbol ρ (rho).
Physical changes in matter are referred to as state changes. They are reversible modifications that do not affect the chemical makeup or properties of matter.
The energy associated with the random, disordered motion of molecules is known as internal energy.
The quantitative relationship between heat transfer and temperature change contains all three factors: Q = mcΔT, where Q is the symbol for heat transfer, m is the mass of the substance, and ΔT is the change in temperature. The symbol c stands for specific heat and depends on the material and phase.
Changing a material’s internal energy causes it to change temperature or state: the specific heat capacity determines the amount of energy required for a specific change in temperature. The specific latent heat required for a specific change in state is determined by the specific latent heat.
Particles in gases travel quickly in all directions, frequently hitting with each other and the container’s edge.
Since more collisions result in more force, the pressure will rise. The pressure rises as the volume decreases. This demonstrates that a gas’s pressure is inversely proportional to its volume.
Gas pressure is caused when gas particles hit the walls of their container. The more often the particles hit the walls, and the faster they are moving when they do this, the higher the pressure.
Atomic structure is the structure of an atom that consists of a nucleus (the center) and protons (positively charged) and neutrons (neutral). The electrons, which are negatively charged particles, circle around the nucleus’s center.
Learn more about the mass number, atomic number and isotopes of the atom with us today!
Learn more about the development of the atom with us today!
Learn more about the radioactive decay and nuclear radiation with us today!
A nucleus changes into a new element by emitting alpha or beta particles . These changes are described using nuclear equations.
Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay.
Radioactive contamination occurs when radioactive material is deposited on or in an object or a person.
Background radiation is a measurement of the amount of ionizing radiation in the environment at a certain area that is not caused by the intentional placement of radiation sources.
Learn more about the Different Half Lives of Radioactive Isotopes with us today!
Radiation is now employed to assist humanity in medical, academia, and industry, as well as to generate power.
Nuclear fission is the process of splitting apart nuclei (usually large nuclei).
Nuclear fusion occurs when two or more atomic nuclei unite to generate one or more new atomic nuclei and subatomic particles (neutrons or protons).
Any influence that causes an object to undergo a specified transformation is referred to as a force. Among the notions that are related are: An object’s velocity is increased through thrust. The velocity of an object is reduced due to air resistance.
Scalars are quantities that are fully described by a magnitude (or numerical value) alone. Vectors are quantities that are fully described by both a magnitude and a direction.
When a contact force. acts between two objects, both objects experience the same size force, but in opposite directions. This is Newton’s Third Law of Motion.
One of the most powerful forces in the universe is gravity. In a gravitational environment, an object having mass experiences a force called as weight.
The Resultant force is the difference between the forces acting on an object when a system of forces is acting on it.
Learn about and revise moments, balanced objects, levers and gears with us today!
This pressure is exerted evenly across the whole surface of the fluid and in all directions. Learn about pressure in fluids with us today!
Atmospheric pressure is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer.
If an object moves along a straight line, the distance travelled can be represented by a distance-time graph. In a distance-time graph, the gradient of the line is equal to the speed of the object.
The rate of change of distance – the distance travelled per unit time – is known as speed. Speed, like distance, is a scalar quantity because it has no associated direction.
On a distance-time graph, a sloping line indicates that the item is moving. In a distance-time graph, the line’s slope or gradient is equal to the object’s speed. The faster the object moves, the steeper the line (and the larger the gradient).
The change in velocity per second, measured in m/s 2, is known as acceleration. A special formula is used describe the link between acceleration, velocity change, and the time it takes to change.
Newton’s first law of motion states that until a resultant force occurs on an item, it will remain in the same state of motion.
Newton’s second law can either be expressed as “resultant force = mass × acceleration” or “The acceleration of an object is directly proportional to the resultant (or net) force, in the same direction as the force, and inversely proportional to the mass of the object.”
We can calculate how fast something comes to a stop using physics and kinematics equations, but the time will never be zero. This signifies that the object continues to move after the force is applied until it comes to a complete stop. The stopping distance is the distance it covers in that amount of time.
Learn about factors affecting braking distances with us today!
Energy can be transported between stores in a variety of methods, including waves. Waves are oscillations or vibrations that occur around a fixed point. Sound waves, for example, cause air molecules to vibrate back and forth. Water particles vibrate up and down as a result of ripples.
The particle motion in transverse waves is always perpendicular to the wave motion. A longitudinal wave is one in which the medium’s particles move in a direction that is parallel to the wave’s movement.
A wave’s reflection is simply the process of a wave, whether light, sound, infrared, or radio waves, colliding with an object and bouncing off of it.
Longitudinal waves are sound waves. They make particles vibrate in the same direction as the waves. Solids, liquids, and gases can all transmit vibrations.
Learn more about the waves of detection and exploration with us today!
The electromagnetic spectrum is a range of wavelengths that never ends. Depending on their wavelength and frequency, the types of radiation that occur in different sections of the spectrum have varied applications and risks.
All electromagnetic waves: are transverse waves; can travel through a vacuum and more!
All electromagnetic waves: are transverse waves; can travel through a vacuum and more!
Electromagnetic waves offer a wide range of practical everyday applications, including cell phone communication and radio broadcasting, among others!
A lens is a transparent piece of material that is usually round in shape and has two polished surfaces, one of which is curved and may be convex (bulging) or concave (depressed).
Some wavelengths or colours of light are absorbed when white light shines on an opaque object. Our eyes are unable to perceive these wavelengths. The other wavelengths are reflected, and our eyes pick them up. White light is made up of all the colours in the visible light spectrum mixed together.
Learn more about magnetism and electromagnetism with us today!
The north pole and the south pole are the two poles of a magnet. The magnet’s magnetic forces are stronger near its poles.
The region around a magnet where a force acts on another magnet or a magnetic material is called a magnetic field.
An electromagnet is a solenoid with an iron core. The magnetic field strength of the solenoid is increased by the iron core. Coiling wire around an iron nail creates a basic electromagnet. Electromagnets are employed in devices that may be operated remotely, such as electronic bells and door locks.
In a magnetic field, the force on a given length of wire increases as the current in the wire increases. The magnetic field becomes more powerful.
A coil of wire free to revolve between two magnetic poles can be used to make a rudimentary electric motor. The coil senses a force and moves when an electric current travels through it.
The motor effect is used by loudspeakers to produce sound. The magnetic field created varies depending on the AC electric current provided to the device.
To make an electric current flow in a circuit, a potential difference or voltage is required. This is referred to as the generator effect and is caused by electromagnetic induction. If the conductor is linked in a complete circuit, the induced voltage produces an induced current.
A potential difference is created across the ends of an electrical conductor when it moves in relation to a magnetic field or when the magnetic field around it changes. A current is induced in the conductor if it is part of a complete circuit. The generator effect is what it’s called.
Sound waves are converted into electrical impulses by the microphone. Microphones use the generator effect to generate a variable current based on sound wave pressure fluctuations.
A transformer is a device that is used to change the voltage of alternating currents. A transformer is made up of two wire coils coiled around a metal core. One coil receives an alternating voltage (the primary coil). A changing (alternating) magnetic field is created in the core as a result of this.
Learn more about Space Physics with us today!
The solar system consists of: a star – the Sun. Planets and dwarf Planets in orbit around the Sun. Satellite moons in orbit around most of the planets.
Learn more about the major life cycle of a star with us today!
Artificial satellites differ from natural satellites in that they are man-made satellites that orbit other planets. Natural satellites, on the other hand, are natural objects that circle the planets and our own planet. The moon is the earth’s natural satellite.
Red shift is a result of the expansion of the distance between the Earth and the galaxies. The light waves are stretched out during their travel to humans as a result of this expansion, moving them towards the red end of the spectrum. The faster a galaxy’s light is red-shifted, the faster it is travelling away from Earth.
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