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If we go outside with wet hair, will we catch a cold?

"If you go outside with wet hair, you'll catch a cold!" Umm, no. You can walk around completely naked with wet hair in the rain on a cold winter day without catching a cold or getting sick.To catch a cold,…

קרא עודIf we go outside with wet hair, will we catch a cold?
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Why Passengers Must Keep Tray Tables Closed During Landing

"#Dear passengers, this is your captain speaking. To ensure a safe landing, please return your seats to the upright position and close your tray tables.#" No problem, but why do we have to do this? Closing the tray tables provides…

קרא עודWhy Passengers Must Keep Tray Tables Closed During Landing
  • Science

Why is common fuel called Octane 95?

Press the buzzer # – “Fill me up with full Octane 95, please.” What is Octane 95? What does that mean?If I refuel with Octane 95, the mixture contains 95% Isooctane and 5% Heptane. Back in the 1930s, it was…

קרא עודWhy is common fuel called Octane 95?

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