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# A system is provided with 50 Joules of heat and the work done on the system is 10 Joules. What is the change in internal energy of the system in Joules?

$\begin {array} {1 1} (1)\;60 & \quad (2)\;40 \\ (3)\;50 & \quad (4)\;10 \end {array}$

(1) 60