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	<title>ETF2L &#8211; Latest activity in &#8220;beautiful talented mathematicians&#8221;</title>
	<link>https://staging.etf2l.org/forum/off-topic/topic-30261/</link>
	<description><![CDATA[The latest posts to this topic.]]></description>
    	<item>
    	    <title>Reply by Theoz</title>
    	    <link>https://staging.etf2l.org/forum/off-topic/topic-30261/page-1/?recent=511723#post=511723</link>
    	    <description><![CDATA[btw thanks, might think that was the solution]]></description>
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    	    <pubDate>Wed, 10 Sep 2014 10:55:58 +0200</pubDate>
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    	<item>
    	    <title>Reply by Theoz</title>
    	    <link>https://staging.etf2l.org/forum/off-topic/topic-30261/page-1/?recent=511723#post=511722</link>
    	    <description><![CDATA[if u wondered about the values, here's the task:

A three-phase motor has the following data: 230V/50Hz, 16kW, cos Φ = 0,85 og η = 0,95.

a) Calculate the necessary values ​​and create effekttrekant ( &#60;- http://kunnskapsbasen.com/heleinnlegget.asp?il=107&#38;kt=24&#38;ukt=166)

here&#039;s what i&#039;ve already found out:
P1 = U * I * sqrt3 * cos Φ       
P1 = 230 * 97.29 * sqrt3 * 0.85      
P1 = 32943.9W
I = P2 / U * sqrt3 * cos Φ * η          
I = 16000 / 230 * sqrt3 * 0.85 * 0.95
I = 97.29A

and here&#039;s the 3 formulas i need for that &#34;effect triangle&#34;

S = U * I * sqrt3
P = S * cos Φ = U * I * sqrt3 * cos Φ
Q = S * sin Φ = U * I * sqrt3 * sin Φ

but since i can&#039;t figure out how to find P, i can&#039;t continue]]></description>
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    	    <pubDate>Wed, 10 Sep 2014 10:47:00 +0200</pubDate>
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    	<item>
    	    <title>Reply by Finn Smith</title>
    	    <link>https://staging.etf2l.org/forum/off-topic/topic-30261/page-1/?recent=511723#post=511664</link>
    	    <description><![CDATA[<i>Quoted from TWEEKARN\</i>
		<blockquote>i need some help to solve this 

S = U * I * sqrt3        
S = 230 * 97.29 * sqrt3     
S = 38757.6

P = S * cos Φ = U * I * sqrt3 * cos Φ
P = 38757.6 * 0.85 = 230 * 97.29 * sqrt3 * 0.85
P = ?

i use wolframalpha as my calc, but this appears http://www.wolframalpha.com/input/?i=38757.6+*+0.85+%3D+230+*+97.29+*+sqrt3+*+0.85

i will reward u with my greatest thanks if u solve it</blockquote>

just put in 230 * 97.29 * sqrt3 * 0.85... (like so: http://www.wolframalpha.com/input/?i=230+*+97.29+*+sqrt3+*+0.85)



It says false because you rounded your value for S (to get some other value, let's call it S'), then you're trying to tell it that S' * 0.85 = S * 0.85, which it tells you is false.]]></description>
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    	    <pubDate>Tue, 09 Sep 2014 16:40:15 +0200</pubDate>
    	</item>
    	<item>
    	    <title>Created by Theoz</title>
    	    <link>https://staging.etf2l.org/forum/off-topic/topic-30261/page-1/?recent=511723#post=511663</link>
    	    <description><![CDATA[i need some help to solve this 

S = U * I * sqrt3        
S = 230 * 97.29 * sqrt3     
S = 38757.6

P = S * cos Φ = U * I * sqrt3 * cos Φ
P = 38757.6 * 0.85 = 230 * 97.29 * sqrt3 * 0.85
P = ?

i use wolframalpha as my calc, but this appears http://www.wolframalpha.com/input/?i=38757.6+*+0.85+%3D+230+*+97.29+*+sqrt3+*+0.85

i will reward u with my greatest thanks if u solve it]]></description>
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    	    <pubDate>Tue, 09 Sep 2014 16:29:09 +0200</pubDate>
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