На електричній плиті потужністю 600 вт нагрівається мідна посудина масою 200 г, у яку налито 0.5 л води при температурі 15°с. через який час вода закипить, якщo ккд установки становить 80%. ))

ОПри изготовлении стеклопакета поверхность стекол в результате нарушений технологического процесса может загрязняться, например, минеральным маслом или расклинивающей жидкостью, которые не были удалены при мойке стекол. В этих случаях на стеклопакете за счет явления интерференции в тонких пленках могут наблюдаться радужные разводы неправильной формы, подобные тем, которые часто можно увидеть на поверхности воды, загрязненной тем же маслом или бензином. Эти разводы хорошо как в проходящем, так и отраженном свете. Их можно увидеть как на отдельных листах стекла, так и в стеклопакетах. В соответствии с требованиями ГОСТ 24866 такие радужные пятна рассматриваются как дефект стеклопакета.

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