1. Unit: Fluids I.What is Pressure? II.Pressure and Depth III.Archimedes’ Principle IV.Bernoulli’s Equation today

3. Your ears are sensitive to pressure. A 12ft tall tube, barely wide enough to stand in, is filled with water. Would you rather: a) go to the bottom of the tube? b) go to the bottom of a 12ft pool? c) Either one. It does not matter.

4. Where would it be easiest to drink with a straw? a) On top of Mt. Everest. b) In Death Valley. c) On the Moon. d) Location doesn’t matter.

5. A scuba diver is observing the lake below. Rate the pressure the diver experiences at the points below (from least to greatest). A C D B

6. What is the longest length straw from which you can “suck” water from a glass on the surface of the earth?

8. A glass of water contains a large ice cube. What will happen to the level of the liquid water when the ice melts? a) It will go up. b) It will go down. c) It will remain at the same level.

9. A log floats in a lake such that one half of the log is submerged. If the log is held beneath the water, what will be its acceleration when released?

10. A log floats in a lake such that one half of the log is submerged. A number of weights that are 1.5 times the density of water are placed on the log. If the log and weights are all completely submerged (but still floating), what is the volume of the weights?

11. An aluminum boat sits in the lake. What happens to the boat when it is filled with Styrofoam? a) It sinks further into the water. b) It rises higher in the water. c) It remains at the same level.

12. An aluminum boat sits in the lake. What happens to the boat when Styrofoam is tied underneath the boat? a) It sinks further into the water. b) It rises higher in the water. c) It remains at the same level.

13. A boat sitting in the lake contains a large rock. What happens to the water level (with respect to the beach) when the rock is thrown overboard (into the water)? a) It goes up. b) It goes down. c) It remains at the same level.

14. A boulder falls off a cliff into the lake. The boulder is five times the density of water. Once it is fully submerged, will it accelerate? If so, what will be its acceleration (magnitude and direction)?

15. A block of wood is floating in a glass of water. What will happen to the block (with respect to the glass) when oil is poured into the glass? a) It will move up. b) It will move down. c) It will remain at the same level. ?

16. You wish to design a spherical barrel in which to go over Niagara falls (bad idea!). If the total weight of you and the barrel is 250 kg, how big (in m 3 ) should the barrel be so that one half of it is above the surface?

17. You notice that a certain piece of material floats in water such that one half of the material is submerged. You then remove the material from the water and place it in a container of oil. Now three quarters of the material are submerged. What is the density of the oil?

18. In the movie Pirate of the Caribbean, Jack and Will carry a boat upside-down (filled with air) under the water. Is this possible?