Report Abuse. 1  How Long Do Anchovies Last. 2  i've got had opened anchovies in my refrigerator for a pair of months the open can sealed in a baggie. 3  Kept in the fridge they have a long shelf life, up to months.  it lasts 2 minutes then all these germs and clear mold get on it and when u eat it the germs eat ur nose hairs!
In physics, a wave is an oscillation accompanied by a transfer of energy that travels through space or mass. Frequency refers to the addition of time. Wave motion transfers energy from one point to another, which may or may not displace particles of the medium âthat is, with little or no associated mass transport.n other words, the velocity of the constituent waves of the wave packet travel at a rate that varies with their wavelength, so some move faster than others, and they cannot maintain the same interference pattern as the wave propagates.
The wave propagation speed is the speed by which the wavefront of the wave passes through a medium. The wavefront is the locus of the same phase point in the wave. It is also known as Velocity factor (VF) . The velocity factor has different equation for different medium.. Group Velocity: It is the velocity with which the amplitude of the wave travels in the medium. It is given by the formula; $V_{G}$=$\frac{d\omega}{dk}$. So, it can also be defined as the rate of change of the angular frequency of the wave with respect to the angular wave number of the wave.