A hollow cube with an edge length of 60.0 cm is placed under water with its 2. top surface at a depth of 4.70 m under the water surface (the bottom surface will be at 5.30 m). Use =1.01x10°Pa where needed. a) Find the difference in pressure between the bottom and the top surface b) Find the average pressure on one of the vertical surfaces. Deduce the average force on it. c) when the cube is released it floats with 0 % of its volume visible above the water surface. Evaluate the mass meube and the density Pcube of the cube. u V d) If the cube is made from a material with density trial 2400kg /m, find the volume V\' of the hollow part inside it. If we fill half the hollow part inside the cube with water, will the cube now float or sink? e) Give reasons for your answer