Anatomy of A Wave
Standing Waves
Random
Sounds
Problems
100
Define period?
What is the time it takes to complete one cycle?
100
A standing wave of frequency 5 Hz is established on a string 2 meters long with nodes at both ends and the center. What is the harmonic of the standing wave shown?
What is 2nd Harmonic and
100
Where is the movement in the standing wave?
What is the antinode?
100
The loudness of a sound wave is the what of the wave?
What is the Amplitude?
100
One blade on a ceiling fan makes a complete rotation in 0.10 seconds. What is the frequency of the fan's rotation?
What is 10 Hz
200
How are period and frequency related?
They are inverse of each other.
200
If my 1st Harmonic frequency is 130 Hz, what is my 8th Harmonic frequency.
What is 1040 Hz.
200
What do they add to bridges and sky scrapers to help counter act their natural frequencies?
What is damping?
200
What are the names of the difference frequencies not heard by Humans?
What is infrasonic and ultrasonic?
200
Microwaves travel at the speed of Light, 3.00x108 m/s. When wavelength is .00476 m, what is the frequency?
What is 63.00x109 Hz.
300
As frequency increase wavelength ________?
What is decrease?
300
If the string the wave on is 7cm, what is the wave length of the wave?
What is 2.8 cm?
300
If A is 20 m, what is the wavelength of the wave shown below?
What is 40m?
300
Two Tuning forks with frequencies of 800 Hz and 450 Hz are stuck. The 450 Hz is stuck in a room with a temperature of 30 degrees Celsius and the 800 Hz is stuck in a room with a temperature of 15 degrees Celsius/ Which of the sound will move faster through the room and why?
What is 450 Hz because as temperature rises, the particles of a gas collide more frequently. Thus in a gas, the disturbance can spread faster at higher temperatures than at lower temperatures.
300
A harmonic wave with 6 antinodes is traveling along a guitar string. It oscillates 30 cycles in 20 sec. A given crest of the wave travels 60 cm along the string in 5 seconds. What is the speed of the standing wave?
What is 12 cm/s
400
A wave that moves across a medium in a direction perpendicular to the direction the wave travels?
What is transverse wave?
400
What is the fundamental (1st Harmonic) frequency of this string if the frequency is 540
What is 270 Hz?
400
An open pipe is designed to play a "C" note of frequency at 262 Hz at an air temperature of 21 degree Celsius. Calculate the length of the pipe?
What is 0.655 m?
400
Daily Double!! A stereo speaker produces a certain intensity and is heard by a person 1 meters away. If that person where to triple their distance, how many speakers would you need to hear the same intensity level?
What is 9 times as many?
400
A closed pipe is designed to play a "D" note of frequency at 294 Hz at an air temp of 18 degrees Celsius. Calculate the length of the pipe
What is 0.3 m.
500
These waves do not require a medium to travel through. Give 2 examples?
What is Electromechanical waves.
500
If I increased the tension on the string, what happens to the fundamental frequency?
What is it will increase?
500
If an open pipe has wavelength w, what will the wave length be for the a closed pipe?
What is 1/4 w
500
The music from a speaker has a power of 130 W. If the intensity is measure to be 0.03 W/m2 , how far away are you from the speaker?
What is 58 m away?
500
Susan measures a 2-second delay between a shout and hearing its subsequent echo. Assuming an air temperature of 15°C, how far away is the object that reflected the sound wave?
What is an object 680 m away