Ch. 14 Waves (General) Ch. 14 Waves (General) ReviewReviewANSWERSANSWERS

COMPLETIONCOMPLETION1.1. FrequencyFrequency2.2. Standing wavesStanding waves3.3. RefractionRefraction4.4. CompressionCompression5.5. MediumMedium6.6. InterferenceInterference7.7. Compressional Compressional

wave wave (longitudinal)(longitudinal)

8.8. TransverseTransverse9.9. Remains the sameRemains the same10.10.nodenode

11.11.Ultraviolet wavesUltraviolet waves12.12.Gamma raysGamma rays13.13.Electromagnetic Electromagnetic

waveswaves14.14.Radio wavesRadio waves15.15.Infrared wavesInfrared waves16.16.Visible lightVisible light17.17.X raysX rays18.18.UltravioletUltraviolet19.19.RadioRadio20.20.EnergyEnergy

COMPLETION continuedCOMPLETION continued

21.21.HigherHigher

22.22.Electromagnetic wavesElectromagnetic waves

23.23.wavelengthwavelength

SHORT ANSWERSHORT ANSWER24.24.A sound wave is a mechanical wave and A sound wave is a mechanical wave and

needsneeds a medium ( a medium (airair) to ) to traveltravel. . There is no There is no air in a vacuum.air in a vacuum.

25.25.The The crust breaking creates vibrationscrust breaking creates vibrations that that carry out energy in the carry out energy in the form of wavesform of waves..

26.26.B,A,CB,A,C

27.27.Amplitude is determined by the area that is Amplitude is determined by the area that is squeezed together.squeezed together.

28.28.At the node (trough), At the node (trough), destructive destructive interferenceinterference takes place and at the crest takes place and at the crest (antinode), (antinode), constructive interferenceconstructive interference takes takes place. place.

SHORT ANSWER continuedSHORT ANSWER continued

29.29.The wavelength decreases The wavelength decreases (shortens) but, the amplitude and (shortens) but, the amplitude and speed stay the same.speed stay the same.

30.30.They both generate changing fields.They both generate changing fields.31.31.Microwaves Microwaves vibrate the water vibrate the water

moleculesmolecules in the cake batter, in the cake batter, creating creating thermal energy to bake the thermal energy to bake the cakecake. There are . There are no water molecules no water molecules in the baking dish.in the baking dish.

SHORT ANSWERS continuedSHORT ANSWERS continued32.32.UVA and UVB are two types of UVA and UVB are two types of

ultraviolet waves. UVA has a longer ultraviolet waves. UVA has a longer wavelength and causes wrinkles wavelength and causes wrinkles and tanning. UVB has a shorter and tanning. UVB has a shorter wavelength and causes sunburn. wavelength and causes sunburn. Too much UVB can cause cancer.Too much UVB can cause cancer.

33.33.When you set your radio to a When you set your radio to a particular frequency, your radio particular frequency, your radio receives that frequency and receives that frequency and whatever is happening on that whatever is happening on that frequency (music, sports, talk radio, frequency (music, sports, talk radio, Oprah, truck drivers, etc)Oprah, truck drivers, etc)

PROBLEMSPROBLEMS

34.34.Given: 4.4 m, 2.0 s Formula: V = Given: 4.4 m, 2.0 s Formula: V = d/td/t

Solution: 4.4 m/2.0 s = 2.2 m/sSolution: 4.4 m/2.0 s = 2.2 m/s

35.35.Given: 2.0 Hz, 10 mGiven: 2.0 Hz, 10 m Formula: Formula: = = ffSolution: 2.0 Hz x 10 m = 20 m/sSolution: 2.0 Hz x 10 m = 20 m/s