Everyday Phenomena

Explanations for events observed at home, on the street, in the kitchen, at work and during travel.

6articles

Banana madura em destaque sobre bancada escura, cercada por elementos científicos sutis, modelo atômico de potássio, referência a K-40 e símbolo de radiação ao fundo.

Everyday Phenomena13/09/20265 min read

Are bananas radioactive? What potassium-40 really means — and where the “banana equivalent” misleads

Bananas contain potassium-40 and therefore have measurable natural radioactivity. The “banana equivalent dose” helps visualize very small doses, but it should not be read as radiat...

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Passageira no banco traseiro de um carro ao lado de uma tela com pontos azuis e um painel sobre conflito sensorial e Motion Assist.

Everyday Phenomena02/09/20266 min read

Why Motion Assist bubbles may reduce car sickness: the science behind the screen cues

Motion Assist bubbles try to align what the eyes see with the motion detected by the inner ear. Learn how sensory conflict works, what the evidence says, and where the limits are.

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Panela transparente com arroz e batatas fervendo a cerca de 93 °C em uma cozinha de montanha, com painel comparando ebulição ao nível do mar e em altitude e uma panela de pressão ao lado.

Everyday Phenomena17/08/20266 min read

Why does water boil sooner at altitude but food takes longer to cook?

At altitude, lower atmospheric pressure reduces the boiling point of water. It may boil sooner, but it boils cooler - and this slows down the cooking process.

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Ilustração em corte de um ar-condicionado split mostrando gotas se formando na serpentina fria, água seguindo pelo dreno e vazamento pela unidade interna.

Everyday Phenomena17/08/20266 min read

Where does the air conditioning water come from — and when is dripping normal or a sign of a problem?

The water in air conditioning comes from the humidity in the air itself. Understand condensation in the evaporator and how to differentiate normal drain from an internal leak.

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Interior de carro em dia chuvoso, com para-brisa coberto por gotas e embaçamento, painel de climatização e setas coloridas indicando fluxos de ar frio e quente.

Everyday Phenomena15/08/20268 min read

Car glass fogged up inside or out: when using hot, cold air, A/C or cleaner

Find out which side the condensation is on and choose the right action: dry the air, heat the glass, reduce cooling or use the cleaner.

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Pessoa diante de um ventilador em um quarto, com o fluxo de ar representado ao redor do corpo sem indicar resfriamento do ambiente.

Everyday Phenomena09/08/20266 min read

Why a fan cools you without cooling the room — and what humidity changes

The fan does not lower the room temperature: it accelerates the loss of body heat. Humidity interferes because it limits the evaporation of sweat.

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