ELI5: Why does a heavy-duty PC battery backup (Online UPS) need its fan running constantly, while a standard, cheaper UPS is completely silent until the power actually goes out?

ELI5: If trees get their carbon from CO₂ in the air, how can that same carbon end up forming huge amounts of solid material like wood, coal, diamonds, and the carbon in steel?

r/explainlikeimfive·19

ELI5: How does the ground stay stable above oil drilling sites?

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ELI5: How does short term and long term memory work?

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ELI5: When weather professionals say "it's __ degrees but feels like __ degrees"... isn't that subjective?

r/explainlikeimfive·19

ELI5: How can a country have a huge economy but a relatively weak currency?

r/explainlikeimfive·23

ELI5: Why does a heavy-duty PC battery backup (Online UPS) need its fan running constantly, while a standard, cheaper UPS is completely silent until the power actually goes out?

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