HEAT - It is also referred to as thermal energy., LIGHT - It is a form of energy caused by light waves., ELECTRICITY - It is the flow of electric charge., SOUND - It is the energy that could be heard through the microphone and the loudspeaker. ,

بواسطة

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟