In Homes Basics
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Lighting is also essential to a modern society. Lights have revolutionized the way we live, work, and play. Most homes still use the traditional incandescent bulbs invented by Thomas Edison. These bulbs convert only about 10% of the electricity they use into light; the other 90% is converted into heat. In 1879, the average bulb produced only 14 lumens (a measure of the quantity of light) per watt, compared to about 17 lumens per watt from modern incandescent bulbs. By adding halogen gases, the efficiency can be increased to 20 lumens per watt.
يلا افهمو يا عباقرة الانجليش ^^_^^
LoOLoO&الاء
هههههههههههه
ردحذفمن الرسم البياني كأنو الهرجة عن الكهرباء
شوفي وكلمة lumens خلاص الهرجة عن الكهرباء
هههههههههههه
يعطيكي العافية يا قمر
الله يعافييكي
ردحذفنورتي الموضووع
بارك الله فيك ياعسل.
ردحذفمع شكري/ليلى علي فرج ^_^