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  1. ليبيا مشاهد مرعبه من ارض ليبيا

  2. What Temperature is Absolute Zero?

    because the hotter the air the faster the molecules move, the colder the air the slower the molecules move ,absolute zero is a tempature where molecules get so cold that they cant move anymore that tempature is -459.67°F or -273.15°C if you looked on a tempature scale they would be (the more common way,the actual tempature without a point) (a point is .) -459°F or -273°C , that tempature is without the point (.)
    in the kelvin tempature way the tempature is 0 kelvin (written in kelvin tempature like this 0 K) its just a K no degree symbol (degree symbols look like ° )
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  3. Interesting Examples of Surface Tension in our Day-to-Day Life

    Quote Originally Posted by Mohamed View Post
    Surface tension is one of the most important and interesting properties of the fluids. Have you ever wondered why some insects like water strider can walk on water? Is it a miracle? Let us see some more interesting examples of the surface tension of fluids in our daily life:

    Introduction

    Surface tension is one of the most important and interesting properties of the fluids. Have you ever wondered why some insects like water strider can walk on water? Is it a miracle? You may have also seen light weight parts like razor blade, needle, and foil etc floating on the surface of the fluid or liquid.

    Or have you ever wondered why rain falls in the form of drops or why drops of water are formed on certain surface? You may have also sometimes seen the water droplets running smoothly on the muddy surface when you blow them with slight air. Then there is popular phenomenon of the capillary action that makes the fluid in capillary at higher levels than the surrounding fluid. All these are the results of the surface tension.


    Some Examples of Surface Tension

    Let us see some more interesting effects of the surface tension in our daily life:

    1) Dew drops: Have you noticed the drops of water on the leaves in your garden in the early morning? The moisture in the atmosphere condenses in the early morning and beads on the leaves due to surface tension. The surface tension gives spherical shape to water drops.

    2) Beading of water on waxed car: Waxing changes the surface properties of your car. When the rains drops fall on your waxed car, they smoothly slide down to the ground keeping your car neat and clean and untouched. Water tends to adhere weekly to the wax and strongly to
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  4. مقطع من الصافات- مؤثرMaher Almuaiqly

  5. الحكم العطائية.. قبسات و فوائد

    هي مجموعة من الحكم عددها 264 حكمة، كتبها ابن عطاء الله السكندري وهو أحمد بن محمد بن عبد الكريم بن عبد الرحمن بن عيسي بن عطاء الله السكندري

    هذه الحكم "بلغت شروحها العشرات ما بين قديم ومعاصر، فمن ابن عباد وابن عجيبة وحتى الغزالي والقرضاوي، كلٌّ ذهب يستقي من عطاء الحكم وينهل من نبعها الفيَّاض، فتعددت الشروح وتعددت الأفهام لكنها جاءت في جملتها؛ لتثبت أننا أمام كلمات نورانية ألهم الله بها قائلها فجمعت في إيجاز عجيب بين بلاغة اللفظ وسهولته وعمق المعنى وأهميته، ويحسب البعض أن الحكم عطاء روحي إيماني فحسب، وأنها أبعد ما تكون عن مخاطبة العقل أو إصلاح خلل الفكر.لكن من يتدبرها سيجد أنها وإن بلغت الذّروة في مخاطبة النفس وتهذيبها وتنبيه القلوب وإحيائها، فإنها كذلك عالجت جوانب من خلل الفكر وسقيم العقل."
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