1. The problem statement, all variables and given/known data Squids and octopuses propel themselves by expelling water. They do this by taking the water into a cavity and then suddenly contracting the cavity, forcing the water to shoot out of an opening. A 6.50 kg squid (including the water in its cavity) that is at rest suddenly sees a dangerous predator. If this squid has 1.75 kg of water in its cavity, at what speed must it expel the water to suddenly achieve a speed of 2.50 m/s to escape the predator? Neglect any drag effects of the surrounding water. 2. Relevant equations m dv/dt=-Vex dm/dt v-vo- -vex loge (m1/m0) 3. The attempt at a solution vex= V/ log (m1/M0) = -2.5 m/s / (log ((6.5-1.75)6.5) = 7.9704 m/s Now I figured out this problem based on the equations that i have and this is the only solution that i keep getting. Am I using the wrong equation or am I entering the numbers wrong? Thanks for the help!