<![CDATA[STEMQnA - 1/26 - 1/29]]>Tue, 09 May 2017 09:10:21 -0700Weebly<![CDATA[January 29th, 2016]]>Fri, 29 Jan 2016 16:00:02 GMThttp://stemqna.weebly.com/126---129/january-29th-2016If the half-life of a given isotope is 7 days, what fraction of the original isotope will be left after 14 days? Yesterday's question was "What substance is the most common moderator used in nuclear reactors world-wide?" The answer was water.]]><![CDATA[January 28th, 2016]]>Thu, 28 Jan 2016 16:00:03 GMThttp://stemqna.weebly.com/126---129/january-28th-2016What substance is the most common moderator used in nuclear reactors world-wide? Yesterday's question was "How many times as much kinetic energy does a falling rock have if it triples its velocity?" The answer was 9. ]]><![CDATA[January 27th, 2016]]>Wed, 27 Jan 2016 16:00:01 GMThttp://stemqna.weebly.com/126---129/january-27th-2016How many times as much kinetic energy does a falling rock have if it triples its velocity? Yesterday's question was "Assuming it is in standard position, a 1081 degree angle will lie in what quadrant of the rectangular coordinate system?" The answer was quadrant 1. ]]><![CDATA[January 26th, 2016]]>Tue, 26 Jan 2016 16:00:04 GMThttp://stemqna.weebly.com/126---129/january-26th-2016Assuming it is in standard position, a 1081 degree angle will lie in what quadrant of the rectangular coordinate system? Friday's question was "What astronomical unit for distance is derived from the parallax of one second of arc?" The answer was a parsec.]]>