Question

(25%) Problem 4:   You have made someone very angry! After a brief struggle, three thugs manage to get you shackled to a heavy steel ball and throw you into the river. You sink to a depth of 9.7 m. Because of the hydrostatic pressure at that depth, your body is squished to 89 % of its original volume. The entire process of your being tossed into the river results in the release of 150 J of heat from your body. Fortunately, you manage to escape and swim to shore. Then you begin to wonder about the change in your internal energy as a result of the entire fiasco.

Answer 1

Solution in the uploaded image

Solution Depth, h= 9.7m let initial volume density of water 1000 leg/m & At depth, final volume = 8% af v- Pressure and depth, hoa (water xgxh. 0.88 u Considering - 1000x Jo Bx Go7= 95060 Pa constant pressure process, work done (w) PAU= 95060 (0.89 - 1) = -10456.6 PXUJ Heat released, Q = 150J From 1st law of thermodynamics, Q = su+w putting valus. 150 = Au +(2659) (-10456-60 Change in internal energy (AU) is AU = 150+10456.60 where is the o nitial volume of your body in m²