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Date: 15-2-2019
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Date: 17-2-2016
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Date: 13-4-2019
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All matter has physical and chemical properties. Physical properties are characteristics that scientists can measure without changing the composition of the sample under study, such as mass, color, and volume (the amount of space occupied by a sample). Chemical properties describe the characteristic ability of a substance to react to form new substances; they include its flammability and susceptibility to corrosion.
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دخلت غرفة فنسيت ماذا تريد من داخلها.. خبير يفسر الحالة
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ثورة طبية.. ابتكار أصغر جهاز لتنظيم ضربات القلب في العالم
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العتبة العباسية المقدسة تستعد لإطلاق الحفل المركزي لتخرج طلبة الجامعات العراقية
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