-A piston of mass 60 kg sits in a cylinder containing water vapour. The diameter of the piston is 20 cm. There is a spring connected above the piston which is originally unstretched, and has a spring constant of 50 kN/m. The piston moves upwards a distance of 5 cm while 200 J of heat is added. Calculate the change in internal energy of the water vapour.

Graw 1 Q A The force generated by a spring is given by F= kx where k is the spring constant, and x is the deflection of the spring. The spring shown in the figure has a spring constant of 9.5 kN/cm. The pressures are P-5000 kPa, P₂=10000 kPa, and P3 = 1000 kPa. If the piston diameters are D=8 cm and D2-3 cm, how far will the spring be deflected? Z Spring- The spring will deflect 1.717 cm. 2 W D₁ S 309 F2 X #3 E D 80 F3 $ 4 C 888 F4 R 25 % V MA FS T U N * 00 8 J DII - M ( 9 K DD F9 O ) V S 0 J L T' P

For a gas of volumes Vi = 9.50  10-4 m3 and Vf = 1.40  10-4 m3 and pressures Pi = 2.00  106 Pa and Pf = 2.05  107 Pa, answer the following.For an isobaric process at Pi, find the internal energy change of the gas during this process.For an isovolumetric process at Vi, find the internal energy change of the gas during this process.