{{tag>conversions energy consumption chapter1_1}}
{{include_n>100}}
 
#@TaskTitle_HTML@##@Lvl_HTML@#~~#@ee1_taskctr#~~  Conversion: Energy Consumption                   #@TaskText_HTML@#   

Convert the following values step by step:

How much energy does an average household consume per day when consuming an average power of $ 500~{\rm W} $? \\
How many chocolate bars ($2'000~{\rm kJ}$ each) does this correspond to?

#@PathBegin_HTML~1~@#
\begin{align*}
W &= 500~{\rm W} \cdot 24~{\rm h} = 12000~{\rm Wh}= 43'200'000~{\rm Ws} = 43'200~{\rm kWs} &&= 43'200~{\rm kJ} \\
\text{Or:  } 
W &= 0.5~{\rm kW} \cdot 24~{\rm h} = 12~{\rm kWh} = 43'200~{\rm kWs}                       &&= 43'200~{\rm kJ} \\ \\

n_{\rm bars} &={{43'200~{\rm kJ}}\over{2'000~{\rm kJ}}} = 21.6~{\rm chocolate~bars} \\
\end{align*}
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#@ResultBegin_HTML~1~@#
\begin{align*}
22~{\rm chocolate~bars}
\end{align*}
#@ResultEnd_HTML@#


#@TaskEnd_HTML@#