آن تستطيع التزلج بسرعة 6 أميال في الساعة. صديقتها غلندा تستطيع التزلج بسرعة 8 أميال في الساعة. إذا بدأن من نفس المكان وتزلجان في خطوط مستقيمة في اتجاهات معاكسة لمدة 3 ساعات، بكم أميلاً ستب,',iden柞lazy" src="https://source.unsplash.com/1600x900/?nature,landscape" data-src="https://source.unsplash.com/1600x900/?nature,landscape" alt="A beautiful landscape">

 

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                        </script>عي theorists speculate. This contradiction indicates that the laws of quantum mechanics may need revision when applied to extremely large systems.

The theory of relativity, including both special and general relativity, describes the nature of gravity and the universe on a large scale. Special relativity describes how time can behave differently for observers moving at high speeds, leading to dilated time in high-speed frames of reference relative to slower frames. General relativity explains gravity as the curvature of spacetime caused by massive objects and how this curvature affects the motion of other objects.

However, general relativity fails to adequately explain certain odd gravitational effects or interactions at the cosmic scale, like the rotation curves of galaxies, the clustering of galaxies, and the large-scale structure of the universe. Several theories have been proposed to fill these gaps, including modified Newtonian dynamics (MOND) and the existence of dark matter and dark energy.

Dark matter and dark energy make up the majority of the universe's mass-energy and were initially proposed to explain gravitational anomalies. Dark matter is necessary to keep galaxies and galaxy clusters together, as the gravitational pull of normal matter is not strong enough to prevent them from flying apart based on their observable spin and motion. This invisible matter interacts with normal matter primarily through gravitational effects, but its nature remains a mystery.

Dark energy, on the other hand, is causing the universe's expansion to accelerate, countering the inward-pulling gravitational force of all the universe's matter. Scientists currently know very little about its properties and origin, other than that it seems to constitute around
أولاً، ابحث عن المسافة التي تقطعها غLENDA في 3 ساعات عن طريق ضرب سرعتها في عدد الساعات التي تسافر: 3 ساعات * 8 ميل/ساعة = 24 ميل
ثم افعل الشيء نفسه لـ آن: 3 ساعات * 6 أميال/ساعة = 18 ميل
الآن أضف عدد الأميال التي روتبتها كلتا الشخصيتين لتجد المسافة الإجمالية بينهما: 18 ميل + 24 ميل = 42 ميل
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