هل غير ميلان المصباح الكهربائي عدد المربعات وكيف?
حل مادة العلوم رابع ابتدائي الفصل الدراسي الثاني ف2نعم غير ميلان المصباح الكهربائي المساحة المضاءة فزادت المساحة ولكن أصبحت شدة الإضاءة أقل مما لو كان المصباح عموديا.
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هل غير ميلان المصباح الكهربائي عدد المربعات وكيف?