Every entry here is still the existing Challenge mode inside a shared concept page. The hub only makes those tasks visible by topic, concept, and starter-track path while reusing the current canonical content and local-first progress store.
Starting from Calm start, make the oscillator complete a shorter cycle without turning it into a wider swing. Keep the displacement graph open so the timing change stays visible.
Simple Harmonic Motion
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Use compare mode to keep a calm baseline in Setup A and make Setup B cycle faster while both setups keep about the same swing size.
Simple Harmonic Motion
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Guided paths
These cards reuse the current starter tracks instead of inventing a separate challenge curriculum. The path stays small, the concepts stay canonical, and the challenge links still land in the existing concept pages.
Start with vector components, move into projectile paths, and then use circular motion to understand how velocity can keep changing direction.
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Short-period force band in Uniform Circular Motion is the best current entry from this path.
Start with torque as the turning effect of force, use centre of mass and support region for static balance, then carry the same rotational language into moment of inertia, rolling motion, and angular momentum.
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Zero turn at the handle in Torque is the best current entry from this path.
Start with one source mass creating a field and potential well, then use that same gravity model to explain circular speed, orbital periods, and the escape threshold.
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Keep the heavier source circular in Circular Orbits and Orbital Speed is the best current entry from this path.
Build from one clean oscillator to energy exchange and then to driven resonance, so the same system grows without changing its core ideas.
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Short-period match in Simple Harmonic Motion is the best current entry from this path.
Start with pressure in a resting fluid, then carry that same branch through continuity, Bernoulli, buoyancy, and drag-limited motion.
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Build the 27 kPa throat in Bernoulli's Principle is the best current entry from this path.
Use oscillation as the entry point, lock down wave speed and wavelength, carry that into longitudinal sound and pitch-versus-loudness cues, add beats as the nearby-frequency superposition bridge, then move into Doppler shifts, interference, standing-wave patterns, and open-vs-closed air-column resonance without losing the live connection between motion and graph.
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Short-period match in Simple Harmonic Motion is the best current entry from this path.
Start with temperature-versus-internal-energy bookkeeping, reuse that particle story for gas pressure, then follow energy transfer into heating curves and phase-change shelves.
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Same contrast, slower loss in Heat Transfer is the best current entry from this path.
Start with source charges and voltage, then carry that same circuit story into current, power, branch behavior, and equivalent resistance.
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Build the upward field in Electric Fields is the best current entry from this path.
Start with current-made magnetic fields, turn changing flux into induced emf with Faraday and Lenz, and then reuse that same field direction story to explain magnetic force on charges and currents.
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High flux, zero emf in Faraday's Law and Lenz's Law is the best current entry from this path.
Stay on the sound branch long enough that longitudinal motion, pitch-versus-loudness cues, beats, Doppler shifts, and open-vs-closed air-column resonance feel like one acoustics path instead of isolated pages.
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Tune slow pulses in Beats is the best current entry from this path.
Follow the bounded wave-optics branch from polarization into diffraction, double-slit interference, color-dependent refraction, and imaging limits so the newer optics pages read like one compact path instead of isolated stops.
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Set a half-power case in Polarization is the best current entry from this path.
Follow the bounded modern-physics branch from threshold emission into line spectra, matter waves, the Bohr hydrogen model, and half-life so the new concept set reads like one path instead of five isolated pages.
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Find the stopping point in Photoelectric Effect is the best current entry from this path.
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Starting from Dipole reference, turn the source pair into an equal positive arch so the horizontal field cancels while the net field still points upward.
Electric Fields
See how source-charge sign, distance, and superposition set the electric field at one probe, then watch a test charge turn that field into a force without changing the field itself.
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Starting from Like-charge arch, reverse the force on the test charge while keeping the same upward field symmetry at the probe.
Electric Fields
See how source-charge sign, distance, and superposition set the electric field at one probe, then watch a test charge turn that field into a force without changing the field itself.
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Starting from Dipole reference, tune the setup until the midpoint has almost zero field but still sits on a clearly positive potential hill.
Electric Potential
Map how source-charge sign and distance shape electric potential, compare potential differences across one honest scan line, and connect the downhill slope of V to the electric field.
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Starting from the matched series pair, change only the circuit structure needed to give each branch the full battery voltage and make the total current land near 4 A.
Basic Circuits
Keep one battery and two resistors in view while current, voltage, resistance, Ohm's law, and the contrast between series and parallel all stay tied to one honest circuit.
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Starting from Gentle glow, keep the 8 ohm load and raise the source until the stage power bar settles near 18 W.
Power and Energy in Circuits
Keep one source and one resistive load in view while current, power, and accumulated energy over time stay tied to the same honest circuit.
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Starting from Unequal series loads, rewire the setup so Load B keeps the full battery voltage while its branch current stays around 1 A.
Series and Parallel Circuits
Switch the same two loads between one loop and two branches, then track how current, voltage, brightness, and charge flow reorganize without changing the battery.
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Starting from the balanced series group, switch the highlighted pair into the parallel case until the reduction card reads about 3 ohm for the grouped pair and about 7 ohm for the full circuit.
Equivalent Resistance
Reduce one highlighted resistor group into an equivalent block, then collapse the whole mixed circuit honestly and watch how the total current and grouped behavior change together.
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