tag:blogger.com,1999:blog-35187314.post1945797909864461657..comments2019-10-14T10:01:01.076-04:00Comments on Physics Buzz: Ask a Physicist: How Many Calories are in that Sunbeam?APS Webmasterhttp://www.blogger.com/profile/05951833208918853453noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-35187314.post-57843902876325487592018-02-17T17:38:32.173-05:002018-02-17T17:38:32.173-05:00This article is why you need to think about your r...This article is why you need to think about your results. If an area the size of Arizona could only feed 31025 people (as the poster above and I calculate) the math is way off.Harvey 6 3.5https://www.blogger.com/profile/04423363425643567255noreply@blogger.comtag:blogger.com,1999:blog-35187314.post-9380705484996798862018-02-17T17:37:11.960-05:002018-02-17T17:37:11.960-05:00Whew! Yeah, thanks for pointing that out, folksâ€”sh...Whew! Yeah, thanks for pointing that out, folksâ€”should have figured something was off there. Wolfram insists that 1900 GJ is the correct figure for total sunlight incident per day in AZ, but obviously that must be per square kilometer or something. We'll get this fixed, pronto.Positronhttps://www.blogger.com/profile/18016559934450653365noreply@blogger.comtag:blogger.com,1999:blog-35187314.post-55878496178740371202018-02-17T15:51:39.784-05:002018-02-17T15:51:39.784-05:00That figure you calculated of 1,900 Gigajoules of ...That figure you calculated of 1,900 Gigajoules of energy hitting Arizona each day is about 7 orders of magnitude too low. AZ gets minimum 5kwh/m2/day, which is 18 Megajoules/m2/day. Arizona is about 295 billion m2, so it should be receiving over 5300 Petajoules of energy each day.<br /><br />Perhaps you didn't convert square miles into square meters? 1,900 gigajoules/day is about right for 114000 m2, but AZ is 114000 Miles2.Jasonhttps://www.blogger.com/profile/13006093564441097281noreply@blogger.comtag:blogger.com,1999:blog-35187314.post-5334211519454539182018-02-17T14:39:15.012-05:002018-02-17T14:39:15.012-05:00Something seems amiss in your analysis. If 90% of...Something seems amiss in your analysis. If 90% of a day's sunlight is needed to support a person for 85 years then that area could only support about 31,000 people per year! (365 days x 85 years) Am I missing something?Timayhttps://www.blogger.com/profile/13391344758691235009noreply@blogger.com