Category: Science
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PSLE Science Reality Lab Vol No.369 | “UL 94 V-0” — Does That Mean the Plastic Is Fireproof?
A massive Primary 5/6 PSLE Science Reality Lab guide to UL 94 V-0: why a standardized material flammability classification is useful evidence but does not mean a plastic or finished product is universally fireproof.
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PSLE Science Reality Lab Vol No.368 | “DC Fast Charging Up to 250 kW” — Will It Charge at 250 kW the Whole Time?
A massive Primary 5/6 PSLE Science Reality Lab guide to “up to 250 kW” EV fast-charging claims: how to separate peak power from the changing charging curve, match comparison conditions and avoid confusing kW with kWh.
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PSLE Science Reality Lab Vol No.367 | “Tested to MIL-STD-810H” — Was the Product Tested Against Every Harsh Environment?
A massive Primary 5/6 PSLE Science Reality Lab guide to “tested to MIL-STD-810H” claims: how to separate a broad standard label from the exact methods, severities, durations and pass criteria actually tested.
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PSLE Science Reality Lab Vol No.366 | “Contour Line = 100 m” — Is Everything Inside the Line Exactly 100 m High?
A massive Primary 5/6 PSLE Science Reality Lab guide to contour maps: why a 100 m contour labels equal elevation along the line, not every point inside it, and how spacing, interpolation and source data limit the claim.
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PSLE Science Reality Lab Vol No.365 | “Nitrate = 10 mg/L as N” — Is There 10 mg of Nitrate Ion in Each Litre?
A massive Primary 5/6 PSLE Science Reality Lab guide to nitrate reported in mg/L as N: why the value refers to nitrogen mass rather than the whole nitrate ion, how to convert bases, and how to compare lab reports correctly.
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PSLE Science Reality Lab Vol No.364 | “230 V AC” — Is the Voltage 230 V at Every Instant?
A massive Primary 5/6 PSLE Science Reality Lab guide to AC voltage labels: why 230 V AC is an RMS value rather than a voltage that stays at 230 V every instant, with safe paper-based transfer cases.
