Physics FAQs | Physics Forums Insights https://www.physicsforums.com/insights/science-math-faqs/physics-faqs/ Science and Math Articles, Tutorials and Guides Thu, 28 Dec 2023 17:11:14 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.3 What Are Tensors and Why Are They Used in Relativity? https://www.physicsforums.com/insights/what-are-tensors-and-why-are-they-used-in-relativity/ https://www.physicsforums.com/insights/what-are-tensors-and-why-are-they-used-in-relativity/#respond Wed, 11 Jan 2023 13:57:09 +0000 https://www.physicsforums.com/insights/?p=14113 https://www.physicsforums.com/insights/what-are-tensors-and-why-are-they-used-in-relativity/feed/ 0 Is there Evidence for the Big Bang? https://www.physicsforums.com/insights/exploring-the-universe-is-there-evidence-for-the-big-bang/ https://www.physicsforums.com/insights/exploring-the-universe-is-there-evidence-for-the-big-bang/#respond Mon, 06 Apr 2020 14:01:15 +0000 https://www.physicsforums.com/insights/?p=29630 https://www.physicsforums.com/insights/exploring-the-universe-is-there-evidence-for-the-big-bang/feed/ 0 Why We Don’t Discuss Perpetual Motion Machines (PMM) https://www.physicsforums.com/insights/why-we-dont-discuss-perpetual-motion-machines-pmm/ https://www.physicsforums.com/insights/why-we-dont-discuss-perpetual-motion-machines-pmm/#comments Thu, 30 Jan 2020 13:15:51 +0000 https://www.physicsforums.com/insights/?p=28210 https://www.physicsforums.com/insights/why-we-dont-discuss-perpetual-motion-machines-pmm/feed/ 12 What Are the Thermodynamics of Black Holes? 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