Q38. A gas is enclosed in a container fitted with a piston of cross-sectional area of 0.10 m2. The pressure of the gas is maintained at 8000 N/m2. When heat is slowly transferred, the piston is pushed up through a distance of 4.0 cm. If 42 J heat is transferred to the system during the expansion, what is the change in the internal energy of the system? Physics — Heat and Thermodynamics — Question 38 of 415A. 5 J B. 10 J C. 20 J D. 30 J E. 40 J Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →