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	<title>Think for Yourself &#187; Physics</title>
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	<description>“Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.” Albert Einstein</description>
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		<title>Think for Yourself &#187; Physics</title>
		<link>http://thinkforyourself.ie</link>
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		<title>How to get an A in Junior Cert Science: Part 1 &#8211; the maths bits</title>
		<link>http://thinkforyourself.ie/2012/05/05/how-to-get-an-a-in-junior-cert-science-part-1-the-maths-bits/</link>
		<comments>http://thinkforyourself.ie/2012/05/05/how-to-get-an-a-in-junior-cert-science-part-1-the-maths-bits/#comments</comments>
		<pubDate>Sat, 05 May 2012 21:01:05 +0000</pubDate>
		<dc:creator>ozymandias1</dc:creator>
				<category><![CDATA[junior cert science]]></category>
		<category><![CDATA[Maths formulae]]></category>
		<category><![CDATA[revision]]></category>
		<category><![CDATA[formulae]]></category>
		<category><![CDATA[Maths]]></category>
		<category><![CDATA[Physics]]></category>

		<guid isPermaLink="false">http://thinkforyourself.ie/?p=1542</guid>
		<description><![CDATA[Many students are turned off Physics because of the maths involved, yet you only need to be able to do ordinary level maths in order to answer all questions which will appear on the Junior Cert paper. Some of these are in the new log-tables, but others are not so you should really try to [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=thinkforyourself.ie&#038;blog=1668413&#038;post=1542&#038;subd=ozymandias1&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Many students are turned off Physics because of the maths involved, yet you only need to be able to do ordinary level maths in order to answer all questions which will appear on the Junior Cert paper.</p>
<p>Some of these are in the new log-tables, but others are not so you should really try to remember all of them because it not always easy to identify the formula you need from the list in the log-tables. Practice looking for them in pages 51 – 56.</p>
<p>To encourage students not to give up on these questions I have put together a document which includes all the equations on the Junior Cert Science syllabus. There are (only) ten of them and by-in-large they are very straightforward. The document includes every maths question that was ever asked on a Higher Level or Ordinary Level paper from when the syllabus was first examined in 2006 up until 2010. It also contains solutions to all these questions.</p>
<p>If you&#8217;re looking for a top grade in June you really should ensure that you&#8217;re familiar with all of these.</p>
<p>You can download this document <a href="http://thephysicsteacher.ie/JC%20Science/Revision/1.%20Science%20formulae.doc" target="_blank">here</a>.</p>
<p>There&#8217;s also a section on Units (we tend to be a little fanatical about these in Physics) and finally a list of practice questions.</p>
<p>If you&#8217;re using this as a teacher it should make a nice revision class or two &#8211; good luck with it!</p>
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		<title>Leaving Cert Physics notes updated</title>
		<link>http://thinkforyourself.ie/2009/02/22/leaving-cert-physics-notes-updated/</link>
		<comments>http://thinkforyourself.ie/2009/02/22/leaving-cert-physics-notes-updated/#comments</comments>
		<pubDate>Sun, 22 Feb 2009 17:21:54 +0000</pubDate>
		<dc:creator>ozymandias1</dc:creator>
				<category><![CDATA[notes]]></category>
		<category><![CDATA[Physics]]></category>
		<category><![CDATA[website]]></category>

		<guid isPermaLink="false">http://thinkforyourself.ie/?p=696</guid>
		<description><![CDATA[This blog has been fairly quiet recently; I have spent every spare minute updating the student notes on the website and feel very proud of my work. I don&#8217;t know if anyone else is going to notice mind, but then I guess that&#8217;s not the point. For each chapter I have included all past exam [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=thinkforyourself.ie&#038;blog=1668413&#038;post=696&#038;subd=ozymandias1&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>This blog has been fairly quiet recently; I have spent every spare minute updating the student notes on <a href="http://www.thephysicsteacher.ie/" target="_blank">the website</a> and feel very proud of my work. I don&#8217;t know if anyone else is going to notice mind, but then I guess that&#8217;s not the point.</p>
<p>For each chapter I have included all past exam questions, which can be cross-referenced with the relavant marking-scheme which is also included. Also included is  a copy of the associated extracts from the syllabus &#8211; this gives the students the responsibility of checking up on me to ensure I have everything covered before moving on to the next chapter.</p>
<p>There is also plenty of &#8220;extra-credit&#8221; material tucked in at the end to help address many of the conceptual difficulties which students (and teachers!)  have; these also help to set the historical and social context of many of the discoveries. Science is after all a very human activity, dispite what you might think from the text-books and syllabus.</p>
<p>I would hope that students outside of my own school would find these useful, particulary those who don&#8217;t have a specialised Physics teacher should find it to be a useful resourse to help them help themselves.</p>
<p>Some would see the decision to allow the students to see their test in advance to be somehow &#8216;cheating&#8217;, but for me it helps overcome one of the biggest obstacles facing many students who may not be in the top bracket; they simply don&#8217;t know what to learn. I have found with this new approach that hard-working students who are of average ability have gone from 50% to 75% since I introduced the option. It doesn&#8217;t change those at the top; the A-students still get their A&#8217;s, while at the other end those determined to do as little as possible still continue to achieve results which reflect this.</p>
<p>But I&#8217;m delighted with this practice. We spend at least one class and maybe two going over these questions at the end of each chapter and before I give them the test. Then I simply pick ten questions from the list, while altering the numbers in the maths questions. After seven years of leaving-cert questions (2002 - 2009) there is a pretty comprehensive bank of questions there, so I don&#8217;t believe it is giving students an inflated sense of their own worth.</p>
<p>But as an incentive to prepare for class tests and greater student participation it is working like a dream. I&#8217;m not too proud to say that I&#8217;m thrilled with my work!</p>
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		<title>Colours from black and white? Say it ain&#8217;t so!</title>
		<link>http://thinkforyourself.ie/2008/11/27/colours-from-black-and-white-say-it-aint-so/</link>
		<comments>http://thinkforyourself.ie/2008/11/27/colours-from-black-and-white-say-it-aint-so/#comments</comments>
		<pubDate>Thu, 27 Nov 2008 19:29:07 +0000</pubDate>
		<dc:creator>ozymandias1</dc:creator>
				<category><![CDATA[Education]]></category>
		<category><![CDATA[motors]]></category>
		<category><![CDATA[Physics]]></category>
		<category><![CDATA[youtube]]></category>
		<category><![CDATA[project]]></category>

		<guid isPermaLink="false">http://ozymandias1.wordpress.com/?p=476</guid>
		<description><![CDATA[We had half a class the other day so we just played around with some equipment left lying about. One such piece was a cardboard disc with black circles and shapes on a white background. If you spin it quickly you get to see coloured circles! It&#8217;s mad I tell you. Only thing is, because it&#8217;s got [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=thinkforyourself.ie&#038;blog=1668413&#038;post=476&#038;subd=ozymandias1&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>We had half a class the other day so we just played around with some equipment left lying about.</p>
<p>One such piece was a cardboard disc with black circles and shapes on a white background. If you spin it quickly you get to see coloured circles! It&#8217;s mad I tell you.</p>
<p>Only thing is, because it&#8217;s got to be a psychological effect it doesn&#8217;t get picked up on the camera.</p>
<p>Hates that.</p>
<span style="text-align:center; display: block;"><a href="http://thinkforyourself.ie/2008/11/27/colours-from-black-and-white-say-it-aint-so/"><img src="http://img.youtube.com/vi/DI9RuL6nFVo/2.jpg" alt="" /></a></span>
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		<title>Unusual resource for explaining Joule&#8217;s Law</title>
		<link>http://thinkforyourself.ie/2008/10/23/unusual-resource-for-explaining-joules-law/</link>
		<comments>http://thinkforyourself.ie/2008/10/23/unusual-resource-for-explaining-joules-law/#comments</comments>
		<pubDate>Thu, 23 Oct 2008 13:21:59 +0000</pubDate>
		<dc:creator>ozymandias1</dc:creator>
				<category><![CDATA[Education]]></category>
		<category><![CDATA[Physics]]></category>
		<category><![CDATA[Science]]></category>
		<category><![CDATA[youtube]]></category>
		<category><![CDATA[joules law]]></category>
		<category><![CDATA[power]]></category>
		<category><![CDATA[transformer]]></category>

		<guid isPermaLink="false">http://ozymandias1.wordpress.com/?p=428</guid>
		<description><![CDATA[An offshoot of Joules&#8217; Law is that when transmitting electrical power, the current is kept as low as  possible in order to reduce energy losses associated with heat of the electrical cables. Because the power being transferred is the product of the voltage and the current, we can still get the same power transferred if [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=thinkforyourself.ie&#038;blog=1668413&#038;post=428&#038;subd=ozymandias1&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>An offshoot of Joules&#8217; Law is that when transmitting electrical power, the current is kept as low as  possible in order to reduce energy losses associated with heat of the electrical cables. Because the power being transferred is the product of the voltage and the current, we can still get the same power transferred if we halve the current and double the voltage, or; make the current very, very small and make the voltage very, very big.</p>
<p>So power -lines transmit power at a voltage of up to 400,000 volts. Then, as the power gets closer to the home, the voltage is reduced in stages, and correspondingly the current gets increased. This occurs in appiances called transformers.</p>
<p>I came across a lovely interactive explanation of this when in honeymoon in Hong Kong.<br />
I couldn&#8217;t resist.</p>
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