1. Which of the following is not a unit of pressure? (Points: 1) atmosphere N / m Pascal mm of mercury Well, I would say it's N/m, but I thought it would not hurt to check. 2. When atmospheric pressure increases, what would hapen to the absolute presure at the bottom of a pool? (Points: 1) It does not change. It increases by a lesser amount. It increases by the same amount. It increases by a greater amount. It should increase by the same amount, due to Pascal's principle. 3. Salt water is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the freshwater, the volume of water displaced in the salt water is (Points: 1) more. less. the same. cannot be determined from the information given. I would say it is less, since it is more dense. 4. An ideal fluid flows at 12 m/s in a horizonal pipe. If the pipe widens to twice its original radius, what is the fluid flow in the wider section. (Points: 1) 12 m/s 6.0 m/s 4.0 m/s 3.0 m/s Do we use: R=v x A ? If so, the answer is 3.0? I am a bit confused here... 5. A person weighing 900 N is standing on snowshoes. Each snowshoe has area of 2500 cm2 . What is the pressure on the snow? (Points: 1) 450 N/m2 900 N/m2 1800 N/m2 3600 N/m2 I have use the equation P=F/A and found the answer to be 3600. 6. In a hydraulic garage lift, the small piston has a radius of 5.0 cm and the large piston has a raduis of 15 cm. What force must be applied on the small piston in order to lift a car weighing 20,000 N on the large piston. (Points: 1) 6.7 x 103 N 5.0 x 103 N 2.9 x 103 N 2.2 x 103 N I have no idea... Please help me... Thanks!