1. Please be Seated

2. Summer Programs Summer Programs for Pre-College Students

3. New from Lecture-Demonstration Now on a two-DVD set: The classic four-hour video collection: Demonstrations in Acoustics for only $20. Discount for direct cash Sales. Inquire in front. Dr. Richard E. Berg, demonstrating over 70 experiments, in 29 titled segments, covering vibrations, waves and sound.

4. You are welcome to visit our Physics Question of the Week http://www.physics.umd.edu/lecdem/outreach/QOTW/active/questions.htm Physics Question of the Week

5. Physics is Phun Electronic Mailing List Electronic Mailing List

6. Water Physics is Phun May 2009 Image compliments of http://www.inmagine.com/v3058/v3058059-photohttp://www.inmagine.com/v3058/v3058059-photo

7. Topics: Physical properties Electrical properties Changes of State Atmospheric phenomena

8. Physical Properties of Water Density = 1 g/cm3 = 1 kg / liter Specific Gravity = 1.000 @ 3.98 o C Specific Heat = 1 cal / gram o C = 1 Btu / lb o F Heat of Fusion = 80 cal / gram = 144 Btu / lb Heat of Vaporization = 540 cal / gram = 970 Btu / lb

9. Weight and Pressure Crush the can using atmospheric pressure Equilibrium tubes

10. Quiz question: What animal has the highest blood pressure? Mammal, fish, bird, or reptile?

11. Quiz question: What animal has the highest blood pressure? Quiz answer: The giraffe!!

12. Pascal’s Law Hero’s Fountain (Hero of Alexandria) Pressure is distributed uniformly throughout a confined fluid.

13. Buoyancy and Archimedes’ Law An object immersed in a fluid experiences a buoyant force equal to the weight of the fluid displaced.

14. Quiz Question

15. Adhesion and Cohesion: Surface Tension Thread loop on water Capillary tubes

16. Dilatancy

17. Electrical Properties 2. Polarization - woodwood - waterwater 1. Conductivity

18. Superheated water in a Microwave Oven

19. Changes of State

21. Ice Crystals

22. Freezing and melting Putting salt on snow and ice The Ice Bomb

23. Evaporation and Condensation Can collapse by condensation Freezing water by pumping

24. Sublimation Ice disappears in freezer or sub-freezing weather Frost patterns on windows (Ice Ferns)

25. Hailstones Form in layers Can be seen using polarized light

29. Water in the Atmosphere

30. Rainbow Mie scattering

31. Rainbow

32. DoubleRainbow

33. Rainbow with Supernumerary Arc

34. Glass Bead Rainbow N1-43

35. “World’s largest human rainbow” 31,000 people at the Polytechnic University of the Philippines.

36. Correct Rainbow! South side of Route 50 on Kent Island, MD

37. Glory Diffraction effect

39. Glory 1

40. Glory 2

41. Ice crystals in the atmosphere

42. Pencil and Plate Ice Crystals

43. Dispersion by Hexagonal Crystal

44. Sundog Dispersion effect

45. Sundog with Sun Pillar

46. Halo Dispersion effect

47. Halo

48. Halo with Sundog and Sun Pillar

49. “Fire Rainbow” Sunlight enters the hexagonal plate crystals' vertical side faces and leaves through their bottom faces, is refracted (as through a prism) and separated into an array of visible colors

50. Various atmospheric Phenomena

51. Wisdom for the Year

52. If you are not part of the solution, you are part of the precipitate.

53. We are on the web at http://www.physics.umd.edu/lecdem/ Animated Gifs compliments of bellsnwhistles.com The End See you next year!