1. Which would exert the least pressure on your bare foot, an elephant or a person? Use the information below to calculate the pressure and \"test\" your prediction. a. An adult elephant foot? (Weight = 87501bs., Area = 310 inz) b. A woman's spike heel? (Weight = 150 lbs., Area = M1 inch x M: inch) 2. A scuba diver descends to a depth of 65 feet (19.8 meters) in the ocean (density = 1025 kg/m3) a. Use the formula for pressure and calculate the pressure on the diver from the water. b. Use the approximation for number of atmospheres per 10 meters to estimate the pressure on the diver from the water. c. Use a ratio to compare the two values you calculated. Make sure you compare values in the same units (i.e., either Pascals or Atmospheres) 3. A plastic toy shark weighs 0.5 pounds. State what would happen if the toy shark was pushed down into the water, displacing 1.5 pounds of water, and then the toy shark was released; would the toy shark sink, remain stationary, or rise in the water. Explain the motion of the toy shark when released; what is the physics that causes this motion? 4. A solid raft made of pine wood measures 4 meters on each side and is 0.5 meters thick. The density of the oak wood is 750 kg/m3 and the raft weighs 41,000 Newtons. This raft is placed into water which has a density of 1000 kg/m3. a. Based on the relative densities, will the raft oat? (Yes or No) b. What is the weight of the water displaced by the raft? c. What is the buoyancy force needed for the raft to float? d. Calculate what the height the water line would need to be for the raft to float