In relativity theory, proper acceleration is the physical acceleration experienced by an object. It is thus acceleration relative to a free-fall, or inertial, observer who is momentarily at rest relative to the object being measured. Gravitation therefore does not cause proper acceleration, because the same gravity acts equally on the inertial observer. As a consequence, all inertial observers always have a proper acceleration of zero.
"}{"fact":"Approximately 24 cat skins can make a coat.","length":43}
{"slip": { "id": 207, "advice": "Always seek out advice or opinions when making a decision."}}
{"type":"standard","title":"University of Alabama System","displaytitle":"University of Alabama System","namespace":{"id":0,"text":""},"wikibase_item":"Q1593069","titles":{"canonical":"University_of_Alabama_System","normalized":"University of Alabama System","display":"University of Alabama System"},"pageid":414490,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/en/f/fa/UASystemSeal.png","width":300,"height":298},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/en/f/fa/UASystemSeal.png","width":300,"height":298},"lang":"en","dir":"ltr","revision":"1285982884","tid":"7a67276a-1b1f-11f0-998a-f9792f640d25","timestamp":"2025-04-17T00:04:06Z","description":"Public university system in Alabama","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/University_of_Alabama_System","revisions":"https://en.wikipedia.org/wiki/University_of_Alabama_System?action=history","edit":"https://en.wikipedia.org/wiki/University_of_Alabama_System?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:University_of_Alabama_System"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/University_of_Alabama_System","revisions":"https://en.m.wikipedia.org/wiki/Special:History/University_of_Alabama_System","edit":"https://en.m.wikipedia.org/wiki/University_of_Alabama_System?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:University_of_Alabama_System"}},"extract":"The University of Alabama System is a public university system in Alabama that coordinates and oversees three research universities: University of Alabama (UA), University of Alabama at Birmingham, and University of Alabama in Huntsville. These universities enroll more than 70,000 students. The system employs more than 45,000 employees at its three campuses and health system making it one of the largest employers in the state.","extract_html":"
The University of Alabama System is a public university system in Alabama that coordinates and oversees three research universities: University of Alabama (UA), University of Alabama at Birmingham, and University of Alabama in Huntsville. These universities enroll more than 70,000 students. The system employs more than 45,000 employees at its three campuses and health system making it one of the largest employers in the state.
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{"fact":"Since cats are so good at hiding illness, even a single instance of a symptom should be taken very seriously.","length":109}
{"fact":"A cat\u2019s eyesight is both better and worse than humans. It is better because cats can see in much dimmer light and they have a wider peripheral view. It\u2019s worse because they don\u2019t see color as well as humans do. Scientists believe grass appears red to cats.","length":256}