If work done on a system is 20 J and a heat of 15 J is taken out, what – McqOptions

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1.	If work done on a system is 20 J and a heat of 15 J is taken out, what is the change in internal energy of the system?
A.	5 J
B.	10 J
C.	20 J
D.	30 J
Answer» B. 10 J

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