12a please circle the answers

1. [-I1 Points] WAUNIPHYSAV1 12.P.002. ASK YOUR TEACHER PRACTICE ANOTHER A 4.5-kg, three legged stool supports a 95-kg person. If each leg of the stool has a cross-sectional diameter of 2.2 cm and the weight of the person is evenly distributed, determine the pressure exerted on the oor by each 2. [-/1 Points] WAUNIPHYSAV1 12.P.005. ASK YOUR TEACHER PRACTICE ANOTHER Three liquids that do not mix are poured into a cylindrical container with a diameter of 10.0 cm. The densities and volumes of the liquids are as follows. Liquid 1: p1 = 2.80 x 103 kg/m3 and v1 = 1.90 x 10-3 m3 Liquid 2: p2 = 1.00 x 103 kg/m3 and v2 = 1.80 x 10*3 m3 Liquid 3: p3 = 0.600 x 103 kg/rn3 and v3 = 1.00 x 10-3 m3 Determine the pressure on the bottom of the container CW 3. [-l1 Points] WAUNIPHYSAV1 12.P.007.TUTORIAL. ASK YOUR TEACHER PRACTICE ANOTHER The owner of a company that manufactures drinking cups decides it would be impressive to build an inground swimming pool that is a scaled up version of her best selling cup. For this particular cup, the area of the circular opening at the top is 1.24 times the area of the circular bottom. Her pool contractor informs her that when the pool is full of water, the magnitude of the force acting on the top surface will be the same as the magnitude of the force acting on the bottom surface. Determine the depth of the pool. rn @ Tutorial Submit Answer 4. [-/1 Points] WAUNIPHYSAV1 12.P.012. ASK YOUR TEACHER PRACTICE ANOTHER Most towns use a water tower to store water and provide pressure in the pipes that deliver water to customers. The gure below shows a spherical water tank that holds 6.00 X 105 kg of water when full. Note that the tank is vented to the atmosphere at the top and that the pipe delivering water to customer Smith is a height h = 7.50 rn above the level of the pipe delivering water to customer Jones. Determine the gauge pressure of the water at the faucet of each house when the tank if full. Smith house Jones house (a) Jones house :Pa (b) Smith house Pa WAUNIPHYSAV1 12.P.016. ASK YOUR TEACHER PRACTICE ANOTHER A reservoir dam has a vertical surface in contact with the water that is 132 m wide and 17.5 m high. Air pressure is one atmosphere. If the reservoir is completely lled, determine the magnitude of the net force acting on the 5. [I1 Points] darn, (Hint: Since the pressure varies linearly with depth, you will need to use your knowledge of calculus in order to determine the force on the dam due to water. Use 1.00 x 103 kg/m3 for the density of water.) EN 6. [I1 Points] WAUNIPHYSAV1 1Z.P.024. ASK YOUR TEACHER PRACTICE ANOTHER Calculate the maximum force in newtons exerted by the blood on an aneurysm, or ballooning, in a major artery, given the maximum blood pressure for this person is 135 mm Hg and the effective area of the aneurysm is 24.5 cmz. Note that this force is great enough to cause further enlargement and subsequently greater force on the ever-thinner vessel wall. (Use 13.6 x 103 kg/m3 as the density of mercury.) EN 1. [-/1 Points] WAUNIPHYSAV1 12.P.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You inate the tires of your car to a gauge pressure of 42.0 lb/inz. If your car has a mass of 1275 kg and is supported equally by its four tires, determine the following, (a) Contact area between each tire and the road E m2 (b) Will the contact area increase, decrease, or stay the same when the gauge pressure is decreased? 0 increase 0 decrease 0 stay the same (c) Gauge pressure required to give each tire a contact area of 123 cm2 SW 8. [-I1 Points] WAUNIPHYSAV1 12.P.027.TUTORIAL. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A rectangular parallelepiped with a square base d = 0.250 m on a side and a height h = 0.120 m has a mass m = 6.00 kg. While this object is floating in water, oil with a mass density p0 = 710 kg/m3 is carefully poured on top of the water until the situation looks like that shown in the gure. Determine the height of the parallelepiped in the water. @ Tutorial 9. [-I1 Points] WAUNIPHYSAV1 12.P.032. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An antique coin is a mixture of silver and copper. The coin has a mass of 1.090 x 10'2 kg and in water weighs 0.1011 N. Determine the mass of silver in the coin. Use 1.05 x 104 kg/m3 as the density of silver, 8.89 x 103 kg/m3 as the density of copper, and 1000 kg/m3 as the density of water. Ska 10. [-/1 Points] WAUNIPHYSAV1 12.P.037. ASK YOUR TEACHER PRACTICE ANOTHER A 5.85-m radius air balloon loaded with passengers and ballast is oating at a xed altitude. Determine how much weight (ballast) must be dropped overboard to make the balloon rise 106 m in 16.0 5. Assume a constant value of 1.2 kg/m3 for the density of air. Ballast is weight of negligible volume that can be dropped overboard to make the balloon rise. EN