Worksheet for Exploration 14.2: Buoyant Force Time: 14 When an object is put into a liquid, it experiences a buoyant force that is equal to the weight of the liquid the object displaces. The force on the wire is given as the block is slowly lowered into the liquid (position is given in centimeters and force is given In newtons). You can change the mass of the block between 0.125 kg and 0.375 kg and the density of the liquid between 500 kg/m" and 1000 kg/m . The object is in static equilibrium when the clock stops. Restart. a. What is the weight of the block and the tension in the string when the block is in the liquid? Therefore, what is the value of the buoyant force? The buoyant force and the tension in the string (the force on the support wire) act upward and the weight acts down. First sketch a free body force diagram for forces acting on the reshaped box. (One of these is the buoyant force)- Fg block submersed= FTensionb. What is the volume of the block in the liquid-either the submerged part of the block if the block is partially submerged when you paused it or the entire block if it is completely submerged (the dimension of the block that is into the screen Is 5 cm)? Length= Width= Depth= Volume Block= C. What is the volume of the water that is displaced by the block (the dimension of both water containers Into the screen is 10 cm)? Verify that this is equal to the answer in (b). Length= Width= Depth= Volume displaced water=_ d. What is the mass of the liquid displaced? What is the weight of the liquid displaced? Check that this is equal to the buoyant force. mass liquid=Worksheet for Exploration 15.1: Blood Flow and the Continuity Equation Time: COLTS Blood flows from left to right in an artery P: 196 with a partial blockage. A blood platelet is shown moving through the artery. Blood Flow How does the size of the constriction (variable from 1 mm to 8 mm from each wall) affect the speed of the blood flow? Restart. Assume an ideal fluid (position is given in millimeters and pressure is given in torr = mm of Hgj. We can use the continuity equation and Bernoulli's equation to understand the motion: Continuity: Av = constant Bernouli: P + (1/2) pv# + pgy = constant. With a 2.0-mm constriction: a. What is the platelet's speed before and after it passes through the constriction? Vbefore Vafter b. What is the platelet's speed while it passes through the constriction? VconstrictionSet the constriction to 8.0 mm. C. Does the speed of the platelet before it reaches the constriction increase, decrease, or not change? d. With the 8-mm constriction, is the speed of the platelet in the constriction faster, slower, or the same as with the 2-mm constriction? e. Assume that the blood vessel and the blockage are cylindrical (circular cross-sectional area for both). Measure the radius of the artery and the radius of the flow area where the blockage is. Verify the equation of continuity to compare the 2-mm and 8-mm cases. Aout= Ain= Now compare the 2-mm and 8-mm cases. What is the pressure inside of and outside the constriction (use the white box to measure pressure)? Pin= Pout g. Does the pressure decrease or increase in the region where the blockage is