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# A power plant produces electrical energy at the rate of 1300 MW with an efficiency of $0.31$. The excess heat is dumped into a river that carries $1500 \mathrm{~m}^3 / \mathrm{s}$ of water. How much does the river's temperature increase?

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In this problem we need to find the temperature increase of the flowing river, having a flow rate $\dot V = 1500~\frac{\rm m^3}{s}$. The source of heat is a power plant producing useful energy at the rate $\dot W = 1300~\rm MW$. The efficiency of the power plant is $e = 0.31$.

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