Author: eduKate Asia
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PSLE Science Reality Lab Vol No.505 | “Power Factor = 0.90” — Does That Mean the Device Is 90% Energy Efficient?
A massive Primary 5/6 PSLE Science Reality Lab guide to power factor: why PF 0.90 is a real-to-apparent-power ratio, not proof of 90% energy efficiency or 10% energy waste.
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PSLE Science Reality Lab Vol No.503 | “Cloud-Top Height = 12 km” — Was 12 km Directly Measured at Every Pixel?
A massive Primary 5/6 PSLE Science Reality Lab guide to satellite cloud-top height: why 12 km is a retrieved estimate from measured radiation, not a direct ruler measurement at every pixel.
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PSLE Science Reality Lab Vol No.502 | “Peak Ground Acceleration = 30% g” — Was the Ground Accelerating at 30% g the Whole Time?
A massive Primary 5/6 PSLE Science Reality Lab guide to earthquake PGA: why 30% g is peak ground acceleration, not constant shaking, a damage percentage, speed or displacement.
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PSLE Science Reality Lab Vol No.501 | “Leq = 70 dBA” — Was the Sound 70 dBA the Whole Time?
A massive Primary 5/6 PSLE Science Reality Lab guide to Leq: why 70 dBA Leq is an energy-equivalent time summary, not a constant sound level, arithmetic dB average or maximum reading.
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PSLE Science Reality Lab Vol No.499 | “Q30 Sequencing Quality” — Was the DNA Read 30 Times, or Is It 30% Accurate?
A massive Primary 5/6 PSLE Science Reality Lab guide to Q30 sequencing quality: why Q30 is a logarithmic base-call error score, not 30× coverage or 30% accuracy, and how to separate per-base quality, run summaries and DNA conclusions.
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PSLE Science Reality Lab Vol No.498 | “Occupancy Probability = 0.80” — Does the Species Occupy 80% of This Grid Cell?
A massive Primary 5/6 PSLE Science Reality Lab guide to species occupancy probability: why 0.80 is not 80% of a grid cell physically occupied, why imperfect detection matters, and how to read modelled presence evidence without turning probability into direct observation.
