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PHY 1020 Chapter 7: Waves !!!Beats measure A. frequency B. The difference between two frequencies C. Loudness 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 A. L wave B. S wave C. P wave D. They all travel at the same speed !The slowest earthquake wave is the A. L wave 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 B. 2 C. 8 D. sqrt(2) !Wind two different waves passed through an opening of the same size, which one will spread more? A. smaller wavelength B. Larger wavelength C. Higher frequency D. Lower frequency !The fastest sound wave is: A. low-frequency 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 A. the amplitude of the P wave B. The amplitude of the S wave C. the frequency of the L wave D. The time between P and S waves !Sound travels fastest in A. air B. water C. rock D. vacuum !When an opening gets smaller, a wave that passes through it A. spreads more B. Spreads less C. Stays the same D. Changes its wavelength !The very center of the earth is A. pure rock B. Liquid rock C. Liquid iron D. Solid iron !What kind of earthquake waves is purely longitudinal? A. L wave B. S wave 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. P waves are fastest, and L waves cause the most destruction C. L we use are the slowest, and P waves cause the most destruction D. P waves are fastest and caused the most destruction !The L wave is often the most damaging because A. it stays on the surface, so it doesn't spread out very much B. In movies slowest, so it has the greatest energy per mile C. the S and P waves carry too little total energy D. It arrives first, before people have a chance to take cover !An earthquake waves distance worst damage when it reaches an area that A. slows it down B. Increases its frequency C. Decreases its frequency D. Adds additional energy !Landfill is dangerous becauseA. the frequency of an earthquake increases B. The wavelength of an earthquake increases 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. is very quiet B. Is very noisy C. Is radioactive D. Focuses earthquakes !Sound tends to bend towards the side with A. colder air B. Warmer air C. Denser air D. Less dense air !The same note is played onto pianos. Beats are heard once per second. From this, we deduce that A. at least one of the pianos is out of tune (the notes are at the wrong frequency) B. Both pianos are out of tune C. The piano's have been accurately tuned D. The pianos will sound especially pleasant if played together !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. doubledB. halved C. Unchanged D. Quadrupled !Beats demonstrate that A. sound is a wave B. Sound Bends C. Sound bounces D. Sound spreads !The velocity of sound is approximately A. 1000 ft./s B. 1 mi./s C. 5 mi./s D. 186,282 mi./s !The speed of sound in air A. is always the same 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 !You are more likely to hear distance sounds when A. that you're near the ground is warm and that you're above it is cool B. That you're near the ground is cool and there above it is also cool 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 depthD. And increase of the velocity with depth !SOFAR Took advantage of A. the sound channel in the ocean B. This sound channel in the atmosphere C. The magnetic field of the earth D. The uncertainty principle !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 !A pianist plays two keys: middle C, and the C above middle C (i.e. an octave higher). The speed of sound for the higher frequency, compared to that for the lower frequency, is(careful, this may be a trick question) A. the same B. 2x faster C. 2x slower D. sqrt(2) faster !As you move to a higher altitude, the temperature of the air A. first gets cooler, then warmer B. Stays constant, then gets cooler C. First gets warmer, then cooler !The atmospheric sound channel would not exist, if not …


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FSU PHY 1020 - Chapter 7: Waves

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