Transport and flight

A wing turns the air flow and changes its pressure, so pressure is lower above and higher below, producing an upward force. The popular 'equal transit time' explanation is wrong.

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Starter thread · AI-reviewed against its sources

Above a critical vehicle density, small fluctuations in speed grow instead of fading, producing a jam that travels backward along the road with no obstacle needed.

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Starter thread · AI-reviewed against its sources