Question: Which relationship is always correct?: ( 1 ) potential energy + kinetic energy = constant. ( 2 ) H = U + PV . (

Which relationship is always correct?: (1) potential energy+kinetic energy=constant. (2)H=U+PV.(3)TriangleH=q_v.(4)Triangle=q+w.(5)TriangleU=TriangleH-PtriangleV

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