Essay On Sound Wave

1. A wavelength is the distance from the peak of a wave to the next peak. The frequency is how often the particles of a wave vibrate. Because the wavelength is a distance, and frequency is a time, when they are multiplied, the velocity of the wave must be found. An example of this relation is a slinky.

The decrease in dielectric constant in lower frequency region is very fast and becomes slow with increase in frequency. Dielectric constant of ferrites depends upon the conduction process. The fact responsible for this conduction is hopping of electron between Fe2+ and Fe3+ . The polarization observed at grain boundaries due to local charge displacement is mainly due to this hopping of electrton. Such variation of dielectric constant with frequency in ferrites can be explained by Maxwell-Wagner model [16].

It is found that an increase in the velocity slip parameter causes decrease in the flow velocity, however an increases in the value of the thermal slip parameter causes increase in the temperature of the fluid. Ramesh et al. [22] studied analytically flows of Casson fluid with slip boundary conditions. Eldabe et al. [23] studied the problem of the boundary layer flow of MHD non-Newtonian nanofluid with heat and mass transfer through a porous medium under the effect of heat generation, radiation and chemical reaction through a porous medium.

Air molecules in this layer now being at higher pressure than the next undisturbed layer transmits their motion to the adjacent layer. That layer further transmits its motion to the another layer and so on. Mean while the body takes a backswing with the result that the air around it now gets rarefied causing a decrease in its density and temperature. This rarefaction of air follows its compression at the same speed although the air does not change its average position. Thus with the continuous outward and inward swings of the body that follows a definite pattern of compression and rarefaction of layers and this effect progresses outward from the body in all directions and this is known as wave motion of sound.

when light travels in a vacuum it is at its peak speed 3.0x10^8 m/s. Contingent upon the new medium the light will travel quicker or slower. It is the distinctive densities that make the decrease in velocity which at that point makes it twist. Light beams slow down around 25% when going through water and 35% when going through glass. On the off chance the light voyages slower then this medium is known as the denser medium.

As well, stronger bonds in the substance and light atoms will vibrate or rotate at a higher frequency, thus acquiring a higher wavenumber. A wavenumber is the number of wave cycles in one centimetre. The information gathered from the IR spectroscopy can be interpreted from an IR spectrum graph of the material. On such a graph, the wavenumber is on the x-axis, whereas the transmittance percentage is on the y-axis. The transmittance percentage indicates the strength of the light that was absorbed by the substance at each frequency.

Increasing the vapour flow actually means decreasing the interaction time between the down flowing liquid and up flowing vapour inside the column. Hence, if ... ... middle of paper ... ...mes more violent and spread out. 4. Pressure drop and foaming As the pressure drop increases in the column, it is observed that the degree of foaming becomes more violent and more spread out. When the pressure drop is relatively high, it means that the pressure exerted by the vapour is insufficient to hold up the liquid in the tray, causing the gas bubbles to appear on top of the sieve trays.

The speed of primary wave can be defined as V_P=√((k+4μ/3)/ρ) when k, μ, and ρ are the bulk modulus, rigidity, density of the surface respectively. Secondary waves (S Wave): S waves are the slower seismic waves that shear through mediums 90 degrees to the travel direction as they propagate (shown in figure 1). S Wave can produce two types of motion, which are vertical and horizontal. Unlike P wave, S wave cannot travel through liquid medium therefore lead to speed reduction in partially liquefied soil. The speed of secondary wave can be defined as V_P=√(μ/ρ), when k, μ, are the bulk modulus, rigidity of the surface respectively.

The quantity of the IMC layer thickness becomes difficult due to the spalling of the reaction layer. During the heat treatment procedure, Sn gradually diffuses into the surface of Ni based superalloy and the concentration of Sn in Ni superalloy increases. So (+')(Sn) eutectic volume fraction is increased after heat treatment, as shown in Fig. 2(c) and (d). The size and volume fraction of (+')(Sn) eutectic increase apparently because the Sn diffuse into superalloy and enlarge the eutectic solidification range.

This changes the KE (kinetic energy) of the moving object into heat energy. This means that there is less KE and more friction. The forces become unbalanced as more and more of the KE is transformed into heat energy. The force pushing the object forwards is then less than the force pushing it back, so the tub stops moving. The larger the force of friction acting on the object, the faster it loses speed.