If a transmission line in a cold climate collects ice, the increased diameter tends to cause vortex formation in a passing wind. The air pressure variations in the vortexes tend to cause the line to oscillate (gallop), especially if the frequency of the variations matches a resonant frequency of the line. In long lines, the resonant frequencies are so close that almost any wind speed can set up a resonant mode vigorous enough to pull down support towers or cause the line to short out with an adjacent line. If a transmission line has a length of 347 m, a linear density of 3.35 kg/m, and a tension of 65.2 MN, what are (a) the frequency of the fundamental mode and (b) the frequency difference between successive modes?
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
If a transmission line in a cold climate collects ice, the
increased diameter tends to cause vortex formation in a passing
wind. The air pressure variations in the vortexes tend to cause the
line to oscillate (gallop), especially if the frequency of the variations
matches a resonant frequency of the line. In long lines, the
resonant frequencies are so close that almost any wind speed can
set up a resonant mode vigorous enough to pull down support towers
or cause the line to short out with an adjacent line. If a transmission
line has a length of 347 m, a linear density of 3.35 kg/m, and a
tension of 65.2 MN, what are (a) the frequency of the fundamental
mode and (b) the frequency difference between successive modes?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 4 images
