Term
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Definition
| Red Shift is the Doppler effect in light when the object is moving away from me and there is a decrease in the frequency of the light because of the movement. |
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Term
| Tell me what Blue Shift is. |
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Definition
| Blue Shift is the Doppler effect in light when the object is moving toward me and there is an increase in frequency of the light because of the movement. |
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Term
| The apparent change in frequency due to the motion of the source or receiver is called the ______ |
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Definition
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Term
| A wiggle in time is a ______________ |
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Definition
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Term
| A wiggle in time and space is a ____________ |
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Definition
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Term
| The time it take a pendulum to swing back and forth is called the _____ |
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Definition
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Term
| Does the period of a pendulum depend upon the mass of the pendulum? |
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Definition
| NO. The period of a pendulum depends upon the length of the radius and g |
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Term
| Name the two things the period of a pendulum depends upon. |
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Definition
| Length of the pendulum, g |
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Term
| Which as the longer period, a long pendulum or a short pendulum? |
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Definition
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Term
| Back and forth vibratory motion is often called (two options) |
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Definition
| Oscillatory motion, simple harmonic motion |
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Term
| Name the Periodic motion in which acceleration is proportional to the distance from an equilibrium position and is directed toward that equilibrium position. |
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Definition
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Term
| What are the low points in a sine curve called? |
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Definition
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Term
| In a sine wave, what is the distance from the top of one crest to the top of the next crest called? |
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Definition
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Term
| How often a vibration occurs is described by its _________________ |
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Definition
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Term
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Definition
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Term
| AM radio waves are measured in: |
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Definition
kilohertz, 960 on the dial is
960,000 vibrations/second |
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Term
| A pattern formed by the overlapping of two or more waves that arrive in a region at the same time is called _________________________ |
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Definition
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Term
| When the crest of one wave overlaps the crest of another, their effects add together. This is called _____________________________ |
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Definition
| constructive interference |
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Term
| When the crest of one wave overlaps the trough of another, their individual effects are reduced. This is called _________________ |
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Definition
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Term
| What is the term applied to two waves for which the crest of one wave arrives at a point at the same time that a trough of the second wave arrives. |
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Definition
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Term
| What is the term applied to two or more waves whose crest (and troughs) arrive at a place at the same time so that their effects reinforce each other? |
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Definition
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Term
| The positions on a standing wave with the largest amplitudes are known as __________________ |
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Definition
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Term
| In a standing wave, certain parts of the rope remain stationary. These are called ___________ |
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Definition
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Term
| A cone-shaped wave produced by an object moving at supersonic speed through a fluid is called shock wave |
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Definition
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Term
| What is a curve whose shape represents the crests and troughs of a wave, as traced out by a swinging pendulum that drops a trail of sand over a moving conveyor belt? |
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Definition
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Term
| A wave in which the vibration is in the ___________ direction as that in which the wave is traveling is called a longitudinal wave. |
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Definition
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Term
| A shock wave is produced by overlapping spheres to form a _______. |
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Definition
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Term
| Why don't we hear a sonic boom from a slower than sound aircraft? |
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Definition
| because the wave crests reach our ears one at a time. |
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Term
| What is the name of the sharp crack heard when the shock wave that sweeps behind a supersonic aircraft reaches the listener? |
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Definition
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Term
| Standing waves are the result of _____________________________ |
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Definition
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Term
| Standing waves can be produced in either _________________ or _____________________ waves. |
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Definition
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Term
| Can a boat travel faster than the speed of the water waves? |
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Definition
| Yes. A boat can travel faster than a wave on the water. |
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Term
| A bow wave is a _______-dimensional wave |
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Definition
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Term
| A shock wave is a __________-dimensional wave. |
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Definition
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Term
| What are the units for lambda? |
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Definition
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Term
| What does the symbol f stand for? |
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Definition
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Term
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Definition
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Term
| When a source moves toward you, do you measure an increase or decrease in wave speed? |
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Definition
| Neither. Wave speed remains the same. Frequency of the wave changes |
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Term
| Long wavelengths have ______________ frequencies. |
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Definition
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Term
| Short wavelengths have ___________ frequencies |
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Definition
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Term
| During a concert, sounds from all the instruments reach you at the same time. Why? |
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Definition
| ν Wave speed depends on the medium holding the wave. The sounds are all traveling through air so ν is constant for all frequencies and wavelengths. |
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Term
| Using the equation: ν=f lambda How can the ν be constant (in air) for all frequencies? |
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Definition
| f↑ then lambda↓ f↓ then lambda↑ frequency and wavelength vary inversely, giving a constant ν. |
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Term
| A metronome is set so that it makes 10 complete vibrations in 12 seconds. Find the frequency of the metronome. |
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Definition
| 10 vibrations/12 seconds = .833 Hz |
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Term
| While sitting on a pier, Carlos notices that incoming waves are 2 m between crests. If the waves lap against the pier every .5 seconds, find a.) the frequency and b.) the speed of the waves. |
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Definition
| Lambda = 2 m; t = .5 sec/cycle = period; f = 1/.5 = 2; ν=f lambda = (2 meters)(2 cycles/second) = 4 m/s |
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Term
| What is the wavelength of a 340 Hz sound wave when the speed of sound in air is 340 m/s? |
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Definition
| f= 340 Hz; ν = 340 m/s; ν= f lambda; so lambda = 340/340; lambda= 1 meter |
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Term
| Sound waves or percussion waves are what type of waves? |
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Definition
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Term
| Can more than one vibration or wave exist at the same time in the same space? |
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Definition
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Term
| When energy is transferred by wave from a vibrating source to a distant receiver, is there transfer of matter between the two points? |
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Definition
| No. The wave moves through the medium. Energy is transferred by a disturbance in the medium. |
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Term
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Definition
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Term
| What is the frequency per second of a 100 Hz wave? |
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Definition
| 100 Hz = 100 cycles/second |
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Term
| The Sears Tower has a frequency of .1 Hz. What is its period? |
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Definition
| f = .1Hz = .1 cycle/second; period = 1/f = sec/.1 cycle = 10 seconds/cycle |
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Term
| FM Radio waves are measured in ________________ |
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Definition
| megahertz, 101FM is 101,000,000 cycles/second |
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Term
| Radar and Microwave ovens operate in ___________________ |
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Definition
| gigahertz or 100,000,000,000 cycles/second |
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Term
| The frequency of the vibrating source and the frequency of the _______ it produces are the same |
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Definition
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Term
| The Doppler effect occurs for __________, ___________, and ________. |
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Definition
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Term
| A wave with vibration at right angles to the direction the wave is traveling is called a __________ ______ |
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Definition
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Term
| What is the name of the V-shaped wave produced by an object moving on a liquid surface faster than the wave speed? |
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Definition
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