1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Word Problems The Electromagnetic Spectrum SoundMisc 1Misc 2

2. The lowest pitch that the average human can hear has a frequency of 20.0 Hz. If sound with this frequency travels through air with a speed of 331 m/s, what is its wavelength?

3. 16.55 m

4. A wave with a frequency of 60.0 Hz travels through steel with a wavelength of 85.5 m. What is the speed of this wave?

5. 5130 m/s

6. A dolphin can typically hear sounds with frequencies up to 150 Hz. What is the speed of sound in water if a wave with this frequency has a wavelength of 1.0 cm

7. 1.5 m/s

8. Sonar is a device that uses reflected sound waves to measure underwater depths. If a sonar signal has a frequency of 288 Hz and the speed of sound in water is 1.45 × 103 m/s, what is the wavelength of the sonar signal

10. Yellow light with a wavelength of 5.89 × 10−7 m travels through quartz glass with a speed of 1.94 × 108 m/s. What is the frequency of the light?

12. The range of electromagnetic waves

13. Electromagnetic spectrum

14. How is the electromagnetic spectrum organized?

15. Increasing or decreasing wavelength

16. Electromagnetic waves that give our skin vitamin D

17. UV

18. Electromagnetic waves that emit heat

19. Infrared

20. What does AM and FM stand for?

21. Electric and magnetic

22. What is sound?

23. Vibrations in the air

24. Define the Doppler Effect

25. Change in pitch due to a moving wave sound

26. What is intensity?

27. Energy in a sound

28. Why does a flute and a guitar sound different?

29. They have a different sound quality.

30. At what level on the decibel scale is the threshold of pain?

31. 130 decibels

32. What are waves?

33. Disturbances that travel through a medium

34. As pitch increases, frequency _______.

35. Increases

36. What two types of waves make up earthquake surface waves?

37. Longitudinal and transverse

38. Draw a longitudinal wave and label the amplitude

40. What type of wave interference do submarines use?

41. Reflection

42. During constructive interference two ______ or two _______ come together and the amplitude _________.

43. Crests, troughs, increase

44. The kind of wave that matter moves in the same direction as the wave.

45. Longitudinal

46. The most energetic waves in the electromagnetic spectrum are___________

47. gamma

48. Unit for sound intensity

49. Decibel

50. Why are plants green?