Physics Waves And Oscillations Level: Misc Level
A string is stretched between fixed supports separated by 68.5 m. It is observed to have resonant frequencies of 341.000 and 378.889 Hz, and no other resonant frequencies between these two.
(a) What is the lowest resonant frequency for this string?
(b) What is the wave speed for this string?
Physics Waves And Oscillations Level: Misc Level
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Mass -spring system is set up on the top of a building. It is designed to oscillate at the same frequency as the building itself, helping to reduce the overall oscillation amplitude of the building.The 3.73 x105 kg mass completes one oscillation in 6.80 s, and the oscillation amplitude in a high wind is I 10 cm. Determine the spring constant and the maximum speed experienced by the mass.
Physics Waves And Oscillations Level: Misc Level
The speed of sound in air is 336 m /s. If an audible sound has a frequency of 3000 Hz, what is its wavelength in meters?
Physics Waves And Oscillations Level: Misc Level
A pendulum having a length of 2.7 m and is on the surface of Planet X. Planet X has a radius of 1.22 re and a mass of 0.6 me ( re and me are the radius and mass of the earth, respectively). What is the period, in seconds of the pendulum?
Physics Waves And Oscillations Level: Misc Level
A tuning fork with a frequency of 440 Hz is held above a resonance tube that is partially filled with water. Assuming that the speed of sound in air is 342 m /s, for what three smallest heights of the air column will resonance occur? Where will the nodes and antinodes occur? (Hint: For resonance to occur, the frequency of the tuning fork must match that of the tube.)
Physics Waves And Oscillations Level: Misc Level
Bats emit sounds of frequencies around 35.0 kHz and use echolocation to find their prey. If a bat is moving at the speed of 12.0 m /s toward an insect at an air temperature of 20.0 % C,( assume the insect and air are still)
(a)What frequency is heard by the insect?
(b)What frequency is heard by the bat from the reflected sound?
(c)Would the speed of the bat affect the answers?
Physics Waves And Oscillations Level: Misc Level
Two point -source loudspeakers are a certain distance apart, and a person stands 12.0 m in front of one of them on a line perpendicular to the baseline of the speakers. If the speakers emit identical 1000.0 -Hz tones, what is their minimum nonzero separation so that the observer hears little or no sound? (Take the speed to be exactly 340 m/s.)
Physics Waves And Oscillations Level: Misc Level
Sound propagating through air at 30 % C passes through vertical cold front into air that is 4.0 % C.If the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
Physics Waves And Oscillations Level: Misc Level
The size of your eardrum (the tympanum) partially determines the upper frequency limit of your audible region, usually between 16,000 Hz and 20,000 Hz. If the wavelength is about twice the diameter of the eardrum and the air temperature is 20 % C, how wide is your eardrum? Is your answer reasonable?
Physics Waves And Oscillations Level: Misc Level
Particles approximately 3.0 x 10 -2 cm in diameter are to be scrubbed loose from machine parts in an aqueous ultrasonic cleaning bath. Above what frequency should the bath be operated to produce wavelengths of this size and smaller?
Physics Waves And Oscillations Level: Misc Level
Sunspots vary in number as a function of time, exhibiting an approximately 10.9 year cycle. Galileo made the first European observations of sunspots in 1610, and daily observations were begun in Zurich in 1749. At the present time (year 2003) we are just past the peak of the 23 rd observed cycle. what is the frequency of the sunspot cycle. Give your answer in Hz.
Physics Waves And Oscillations Level: Misc Level
The maximum speed of a 2.57 kg mass attached to a spring is 0.610 m/s, and the maximum force exerted on the mass is 15.8 N.what is the amplitude of motion for this mass? what is the force constant of the spring? what is the frequency of this system?
Physics Waves And Oscillations Level: Misc Level
Calculate the period of oscillation of a disk of mass 0.376 kg and radius 0.143 m if it is pivoted about a small hole drilled near its rim.
Physics Waves And Oscillations Level: Misc Level
A 1.44 g spider oscillates on its web, which has a damping constant of 3.30 E-5 kg /s. How long does it take for the spider's amplitude of oscillation to decrease by 11.0 % ?
Physics Waves And Oscillations Level: Misc Level
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.480 s and the spring in the scale has a force constant of 641 N /m. what is the mass of the grapes?
