PHY 202 Crossword Puzzle Across 1. A swinging weight suspended from a fixed point 4. A helical metal coil that returns to its former shape when released 5. Watts per square meter 8. What you hear when a siren passes by you 13. Cream dissolving in coffee 16. Energy that flows from a higher temperature object to a lower temperature object 17. A material that doesn't conduct heat well 18. PV=nRT 19. Periodic table unit 21. 343 m/s 25. SI unit for quantity of a substance 26. Newton per square meter 27. A reversible engine 29. A single frequency sound 33. Involves the bulk movement of a fluid 34. The lower limit for temperature 35. The motion of the molecules of a substance 36. The maximum extent of oscillation, measured from the position of equilibrium 37. The rate at which something is repeated Down 2. A wave in which the disturbance is parallel to the direction of travel 3. Where light rays only appear to meet 6. A wave that has no need for a medium 7. A process with no heat transfer 9. The net effect = the sum of individual effects 10. Temperature scale based on water 11. The separation of colors in a prism 12. A wave in which the disturbance is perpendicular to the direction of travel 14. The force in Archimedes Principle 15. When a light ray goes from one medium into another 20. Where light rays actually meet 22. Mass per unit volume 23. The bending of a wave around an obstacle 24. Inversely proportional to frequency 28. When the driving force matches the natural frequency 30. Disorder 31. A comparison of sound intensities 32. Food energy