Author: eduKate Asia
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PSLE Science Reality Lab Vol No.353 | “D50 = 20 µm” — Are Half the Particles Exactly 20 µm Wide?
PSLE Science Reality Lab: learn how D50 summarises a particle-size distribution without meaning every particle is 20 µm or half the particles are exactly that size.
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PSLE Science Reality Lab Vol No.352 | “LAeq = 70 dB” — Was the Sound 70 dB the Whole Time?
PSLE Science Reality Lab: learn how LAeq summarises changing sound over a stated interval without implying that the sound stayed at one constant level or never had louder peaks.
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PSLE Science Reality Lab Vol No.351 | “100 MPGe” — Did the Electric Car Use One Gallon of Gasoline to Travel 100 Miles?
PSLE Science Reality Lab: learn how to read MPGe as an energy-equivalent comparison for electric vehicles, not actual gasoline consumed, guaranteed range or a direct cost figure.
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PSLE Science Reality Lab Vol No.350 | “Beaufort Force 8” — Is the Wind Blowing at 8 m/s?
PSLE Science Reality Lab: learn how to read Beaufort Force as an empirical wind category linked to defined speed ranges and observed conditions, not as a raw wind-speed measurement with the same printed number.
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PSLE Science Reality Lab Vol No.349 | “Solar Panel Efficiency = 22%” — Does the Other 78% Become Waste Heat?
PSLE Science Reality Lab: learn how to read a solar-panel efficiency percentage as electrical output divided by incident solar power under stated conditions, without assuming every unconverted joule becomes only waste heat.
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PSLE Science Reality Lab Vol No.348 | “This Global Satellite Image Was Taken Today” — Was Every Pixel Captured at the Same Moment?
PSLE Science Reality Lab: learn how to read a global satellite mosaic as a stitched or composited representation built from multiple swaths, passes or times, not automatically as one instantaneous photograph.
