How can the period of a pendulum be measured more accurately?
Timing many oscillations makes the total interval longer, reducing the percentage effect of reaction-time uncertainty; dividing by the number gives the mean period.
Specification 0625. Explore a topic, practise the skill, and see where to focus next.
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Timing many oscillations makes the total interval longer, reducing the percentage effect of reaction-time uncertainty; dividing by the number gives the mean period.
At constant temperature p₁V₁ = p₂V₂, so p₂ = 100 × 60/40 = 150 kPa.
Wave speed v = fλ = 25 × 1.6 = 40 m/s.
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Correct answer: Time many complete oscillations and divide by their number
Timing many oscillations makes the total interval longer, reducing the percentage effect of reaction-time uncertainty; dividing by the number gives the mean period.
Correct answer: 150 kPa
At constant temperature p₁V₁ = p₂V₂, so p₂ = 100 × 60/40 = 150 kPa.
Correct answer: 40 m/s
Wave speed v = fλ = 25 × 1.6 = 40 m/s.
For parents: look at the explanation together. A correct answer is encouraging; a missed answer gives you something specific to work on. Broader practice over time is needed to understand progress.
The calculated loss of gravitational potential energy mgh can be compared with gained kinetic energy ½mv²; any difference can be discussed as transfer to thermal and sound energy.
Watch for: Do not substitute numbers before stating the relationship used for Motion, forces and energy. Convert units first and explain what the calculated result means.
Equal surface area, temperature and detector geometry isolate surface finish; repeats improve reliability and show whether dull black emits more strongly.
Watch for: Do not substitute numbers before stating the relationship used for Thermal physics. Convert units first and explain what the calculated result means.
The emerging rays diverge and their backward extensions meet on the object's side, producing the enlarged upright virtual image used by a magnifying glass.
Watch for: Do not substitute numbers before stating the relationship used for Waves. Convert units first and explain what the calculated result means.
Both are measured in volts: e.m.f. describes work done by a source around the complete circuit, while p.d. describes energy transferred by charge in a component.
Watch for: Do not substitute numbers before stating the relationship used for Electricity and magnetism. Convert units first and explain what the calculated result means.
Controlled absorber tests show alpha stopped by paper, beta strongly reduced by aluminium and gamma requiring dense thick shielding for substantial reduction.
Watch for: Do not substitute numbers before stating the relationship used for Nuclear physics. Convert units first and explain what the calculated result means.
Core collapse leaves a neutron star or black hole, while expelled material forms a nebula enriched with elements that can contribute to later stars and planets.
Watch for: Do not substitute numbers before stating the relationship used for Space physics. Convert units first and explain what the calculated result means.
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Cambridge IGCSE · International GCSE · Physics · 0625
2026-2028 syllabus, version 2; December 2025 web-link-only update applied
Source checked: 2026-08-28. The current official specification controls assessment requirements and option choices.
Yes. This page offers three original questions from three different skills on this exact course. Each answer has an explanation, followed by a sample heatmap showing what was correct and what to revisit. No account is needed, and taster answers are not saved.
It shows the outcome of these three answers and gives a specific skill to discuss or practise next. It is not a full assessment, a mastery score or a grade prediction. Broader practice over time is needed to understand progress.
LearningP currently maps 6 assessed areas for specification 0625. The visible topic map below is derived from the verified route; the current official specification remains controlling.
The verified source bank contains 120 original LearningP question records for this route. Every mapped area meets the current publication minimum and passed the latest blocker and review audit.
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Use the official Cambridge IGCSE specification and assessment-resource pages linked on this page, together with information supplied by the learner’s school.