PHY 1020 Chapter 7 Waves Beats measure frequency A The di erence between two frequencies B Loudness C D The presence of noise Waves tend to bed into the side A with slower wave velocity B With higher wave velocity C That is upward D That is downward The fastest earthquake waves is the L wave A B S wave C P wave D They all travel at the same speed The slowest earthquake wave is the L wave A B S wave C P wave D They all travel at the same speed And octave refers to two frequencies that day for by a factor of A 1 5 2 B C 8 D sqrt 2 smaller wavelength Larger wavelength Wind two di erent waves passed through an opening of the same size which one will spread more A B C Higher frequency Lower frequency D low frequency The fastest sound wave is A B Middle frequency voice C High frequency D They all travel at the same speed You can measure the distance to the epicenter by measuring the amplitude of the P wave A The amplitude of the S wave B the frequency of the L wave C D The time between P and S waves Sound travels fastest in air A B water C rock D vacuum When an opening gets smaller a wave that passes through it A B C D Changes its wavelength spreads more Spreads less Stays the same The very center of the earth is A pure rock B C D Solid iron Liquid rock Liquid iron What kind of earthquake waves is purely longitudinal L wave A S wave B C P wave D They are all longitudinal Which of the following statements about earthquakes is true A S waves are fastest and causes the most destruction B C D P waves are fastest and caused the most destruction P waves are fastest and L waves cause the most destruction L we use are the slowest and P waves cause the most destruction The L wave is often the most damaging because A B C D it stays on the surface so it doesn t spread out very much In movies slowest so it has the greatest energy per mile the S and P waves carry too little total energy It arrives first before people have a chance to take cover An earthquake waves distance worst damage when it reaches an area that slows it down A B Increases its frequency C Decreases its frequency D Adds additional energy Landfill is dangerous because the frequency of an earthquake increases A The wavelength of an earthquake increases B C They tend to focus earthquake energy D The amplitude of the earthquake increases When there is an atmospheric inversion sound tends to A become focused B Bend upward C Bend downward D Become absorbed The ocean sound channel A B C D Focuses earthquakes is very quiet Is very noisy Is radioactive colder air Sound tends to bend towards the side with A B Warmer air C Denser air D Less dense air at least one of the pianos is out of tune the notes are at the wrong frequency The same note is played onto pianos Beats are heard once per second From this we deduce that A B Both pianos are out of tune C D The pianos will sound especially pleasant if played together The piano s have been accurately tuned We know that the inner part of the earth is liquid because A no S waves move across it B We can detect the flow of material from the emitted sound C At such great pressures everything becomes liquid D Neutrinos pass through it and show the pattern A magnitude 9 earthquake compared to a magnitude 8 earthquake A has twice the energy B Has 10 to 30 times the energy C Has velocity 2x faster D As velocity 10 to 30x faster You ve the all the tremors of an earthquake 10 seconds later you feel another shaky The distance to the epicenter is about A 2 miles B 5 miles C 10 miles D 50 miles If we doubled the frequency of set the wavelength is A doubled B halved C Unchanged D Quadrupled Beats demonstrate that sound is a wave A Sound Bends B C Sound bounces D Sound spreads The velocity of sound is approximately A 1000 ft s 1 mi s B C 5 mi s D 186 282 mi s The speed of sound in air is always the same A B Increases if you shoot louder C Depends on frequency D Increases as air temperature increases Sound waves are A Transverse B Compressional longitudinal C Combination of transverse and compressional D Rotational On a typical day sound emitted near the ground tends to bend A upward toward the sky B Downward toward the ground C Not at all it goes straight that you re near the ground is warm and that you re above it is cool That you re near the ground is cool and there above it is also cool You are more likely to hear distance sounds when A B C Air near the ground is warm and the air above it is cool D The air near the ground is cool in the air above it is warm Because of the fact ration that is above the surface of the lake becomes cool Sound in the air above the link will tend to A bend upward away from the surface B Bended downward toward the surface C Go in a straight line parallel to the surface D Go alternatively up and down To have a sound channel there must be A A minimum in the velocity of sound B A maximum in the velocity of sound C The decrease in the velocity with depth D And increase of the velocity with depth SOFAR Took advantage of A B C D The uncertainty principle the sound channel in the ocean This sound channel in the atmosphere The magnetic field of the earth water waves are A pure transverse waves B Your longitudinal waves C Both transverse and longitudinal D compressional The sound channel in the ocean carries sound a long distance because A The ocean doesn t absorb sound at that level B Whales listen to the sound and sing it again increasing it s volume C The pressure of the ocean at that depth makes sound louder D The sound doesn t spread out in the up or down directions As you travel deeper into the ocean the water temperature A decreases with depth B Increases with depth C Does not change with depth D First gets colder and then it gets warmer As you move to a higher altitude the temperature of the air A first gets cooler then warmer B C Stays constant then gets cooler First gets warmer then cooler The atmospheric sound channel would not exist if not for thunderstorms A B Carbon dioxide C Ultraviolet light Infrared light D The ozone layer is created by A B C D carbon dioxide Lightning Sunlight …
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