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The Water Cooler
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Starship! - The Future is Being Built Now
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<blockquote data-quote="Dale00" data-source="post: 3474640" data-attributes="member: 688"><p>I'm pretty sure the speed of 17,500 mph is relative to a fixed point of the earth. </p><p>The same source cited above says that "The Earth itself is moving around the Sun at about 67,000 mph."</p><p></p><p>Also...how fast is the earth rotating?...it depends on where you are standing:</p><p>The Earth rotates on its axis once each day. Because the circumference of the Earth at the <a href="https://www.thoughtco.com/geography-of-the-earths-equator-1435536" target="_blank">equator</a> is 24,901.55 miles, a spot on the equator rotates at approximately 1,037.5646 miles per hour (1,037.5646 times 24 equals 24,901.55), or 1,669.8 km/h.</p><p>At the <a href="https://www.thoughtco.com/the-north-pole-1435098" target="_blank">North Pole</a> (90 degrees north) and <a href="https://www.thoughtco.com/the-south-pole-1434334" target="_blank">South Pole</a> (90 degrees south), the speed is effectively zero because that spot rotates once in 24 hours, at a very, very slow speed.</p><p>To determine the speed at any other latitude, simply multiply the cosine of the degree latitude times the speed of 1,037.5646"</p><p></p><p>Hopefully all these amazing developments will stir interest in technology and we will inspire a new and much needed generation of American engineers and scientists.</p></blockquote><p></p>
[QUOTE="Dale00, post: 3474640, member: 688"] I'm pretty sure the speed of 17,500 mph is relative to a fixed point of the earth. The same source cited above says that "The Earth itself is moving around the Sun at about 67,000 mph." Also...how fast is the earth rotating?...it depends on where you are standing: The Earth rotates on its axis once each day. Because the circumference of the Earth at the [URL='https://www.thoughtco.com/geography-of-the-earths-equator-1435536']equator[/URL] is 24,901.55 miles, a spot on the equator rotates at approximately 1,037.5646 miles per hour (1,037.5646 times 24 equals 24,901.55), or 1,669.8 km/h. At the [URL='https://www.thoughtco.com/the-north-pole-1435098']North Pole[/URL] (90 degrees north) and [URL='https://www.thoughtco.com/the-south-pole-1434334']South Pole[/URL] (90 degrees south), the speed is effectively zero because that spot rotates once in 24 hours, at a very, very slow speed. To determine the speed at any other latitude, simply multiply the cosine of the degree latitude times the speed of 1,037.5646" Hopefully all these amazing developments will stir interest in technology and we will inspire a new and much needed generation of American engineers and scientists. [/QUOTE]
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