l. Bouyancy! (10 points) Two bricks are completely submerged in water. Brick 1 is made of lead and has rectangular dimensions of 2cm x 4cm x 8cm. Brick 2 is made of wood and has rectangular dimensions of 1 cm x 8 cm x 8cm. True or Flase: The bouyant force on brick 2 is larger than the bouyant force on brick 1. Explain your answer. 2. Pressure! (10 points) The pressure on the surface of a laker is P0 = 101 kPa. (a) At what depth is the pressure 2P0? (b) If the water were to be replaced with mercury, what is the pressure at the depth you calculated for in (a)? 3. Fishy! (10 points) Most species of fish have expandable sacs, commonly known as "swim bladders,\" that enable sh to rise in the water by filling the bladders with oxygen collected by their gills and to sink by emptying the bladders into the surrounding water. A freshwater fish has an average density equal to 1.05 }% and a mass of 0.825 kg when its swum bladder is empty. How large must the volume of the swim bladder be to maintain neutral bouyancy? Assume the density of oxygen in the swim bladder is equal to air at standard temperature and pressure. 4. Constricted! (10 points) The pressure in a section of a horizontal pipe with a diameter of 2 cm is 142 kPa. Water ows through the pipe at 2.80 a If the pressure at a certain point is reduced to 101 kPa by constricting the pipe, what should the diameter of the contricted pipe be