1. FLUID MECHANICS

3. Why does a raft flow on water? Why is water turbulent in the rapids and smooth in other places on a river?

11. Displaced Volume of a Liquid

12. Apparent Weight Supports Buoyant Force Idea

13. Archimedes’ Principle determines the amount of buoyancy.

15. Buoyant Force on Floating Objects

16. The density of an object determines the depth of submersion.

17. Buoyancy can be changed by changing average density.

18. Conceptual Challenge

19. Astronauts sometimes train underwater to simulate conditions in space. Explain why.

20. Explain why balloonists use helium instead of pure oxygen in balloons.

25. Why do deep sea explorers have to wear diving suits?

31. The Science of Toothpaste

32. Applied pressure is transmitted equally throughout a fluid.

37. Pressure varies with depth.

38. Water pressure increases with depth because the water at a given depth must support the weight of the water above it.

45. Conceptual Challenge

46. A woman wearing snowshoes stands safely in the snow. If she removes her snow shoes, she quickly begins to sink. Explain what happens in terms of Force and Pressure.