You can buy them on line, but I buy this brand at the market, which is a bit more expensive on line, although I do not know what shipping costs are. I store the jars in the fridge after I have opened them, and I imagine that you could store tinned anchovies in olive oil in a small jar in the fridge for some time.
Wave Velocity vs Wave Frequency. Wave velocity and wave frequency are two very important properties of a wave. The wave velocity describes how fast the energy is propagating. The wave frequency describes how fast the wave is oscillating. Both of these properties are very important in defining and describing the wave. Wave velocity is a property of the medium for a certain type of wave. The wave frequency is a property determined by the frequency of the source. â¢ Wave frequency stays constant regardless of the medium the wave is travelling on. Wave velocity changes with the medium.
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.