http://a-bronx.livejournal.com/ ([identity profile] a-bronx.livejournal.com) wrote in [personal profile] bookburner 2008-08-14 06:44 pm (UTC)

Вот именно. Самолёт платит топливом, получая возможность не расходовать потенциальную энергию (т.е. высоту). Планер платит потенциальной энергией (высотой), получая возможность не расходовать топливо.
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