GCSE Physics Atomic structure solvers

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Guides that help with every calculation

• How to rearrange physics equations The balance method, formula triangles and five worked examples, including square roots.
• GCSE physics units and prefixes Every SI unit, prefixes from nano to giga, and the conversions that cost marks.
• How to show your working A four-line layout for every calculation, plus rounding rules and multi-step questions.
• Kinetic energy exam questions Seven worked questions, from 2-mark substitutions to a falling ball that links GPE and kinetic energy.
• GPE exam questions Six worked questions on Ep = mgh, including height, mass, the Moon and a crane power problem.
• Density required practical How to measure the density of regular and irregular objects and liquids, with a worked results table.
• Specific heat capacity vs latent heat Which equation to use when, with a heating curve and a two-step ice-to-water question.
• Half-life calculations Halving step by step, net decline, finding half-life from a graph and carbon dating, with worked answers.
• Mass vs weight Why your weight changes on the Moon but your mass doesn’t, with W = mg worked examples.
• How to use v² − u² = 2as Final velocity, distance, braking and falling objects, with the squaring and square-root steps shown.
• Moments and the principle of moments See-saws, beams with several forces, levers and gears, with worked answers.
• How to use the equation sheet What the AQA sheet gives you, what it leaves out, and a four-step method for picking the right equation.
• Significant figures and standard form How many figures to give, which zeros count, and typing standard form on a calculator.
• Efficiency: 6 common traps Mixing joules and watts, percentages in the equation, wasted energy and answers over 100%.
• I–V characteristics practical Circuit, method and graphs for a resistor, filament lamp and diode, with resistance worked out.
• Wave speed calculations v = fλ and T = 1/f for sound, light and water waves, ripple tanks and echoes.
• Transformer calculations Step-up and step-down transformers, finding turns and currents, and the National Grid.
• 7 rearranging mistakes that cost marks From dividing by only one term to missing the square root, with right and wrong examples.
• Specific heat capacity required practical Method, sample results, the graph method and why your value comes out too high.
• Series vs parallel circuits Current, pd and resistance rules side by side, with worked series and parallel calculations.
• Power and energy in circuits P = VI, P = I²R, E = Pt and E = QV: which to use, kettle and lamp examples, and the National Grid.
• Speed, velocity and acceleration Scalars and vectors, s = vt, a = Δv/t, typical speeds and reading motion graphs.
• Newton's second law and the acceleration practical F = ma worked questions, plus the required practical: method, light gates and the graphs to draw.
• Momentum and conservation of momentum p = mv, collisions with directions, explosions and recoil, and why crumple zones reduce the force.
• Pressure in fluids: p = hρg Why pressure rises with depth, worked p = hρg questions, upthrust, floating and atmospheric pressure.
• AQA vs Edexcel vs OCR physics equations What is the same and what differs between the boards’ equation sheets, papers and practicals.
• Foundation vs Higher tier: which equations differ Grades on each tier, the 6 Higher-only equations on the AQA sheet and the Physics-only ones.
• GCSE Physics 8-week revision timetable A printable week-by-week plan in AQA topic order, with two practice-paper weeks and a tick list.
• How parents can help with GCSE physics How the exams work, where marks are lost and seven simple ways to help, even without a physics background.
• Required practicals checklist (AQA, all 10) Aim, equipment and equation for every AQA Physics required practical, with a tick list that saves progress.