Draw a sketch of the dispersion relation with appropriately labelled axis?
Dispersion Relation (Surface Plasma Wave) 3. (a) Show that the dispersion relation for surface plasma waves 2 26 eff 2 eff N
5.4. Draw a labelled diagram of a duplex scanner system. (18) Draw a labelled diagram of a MEDICAL duolex scanner (18)
5.7 Consider the dispersion relation (4.4) for a one-dimensional monatomic lattice of N atoms. Show that the density of normal modes is given by 2N D(0) (02-22
3.1 Draw a sketch showing the typical Gaussian pattern of the atmospheric dispersion of an airborne plume. Show maximum concentration, wind speed and stack height. Give the 6 assumptions of the Gaussian plume model (10) 3.2 What problem is created by buoyant stack emissions? (5) 3.3 During the December summer holidays, the N3 from Johannesburg to Durban carries 30 000 cars per hour for 13 hours of daylight, (15 000 per hour each way) at an average speed of 120...
given the acoustic and optical branches for a phonon dispersion of 1-d chain 1) Find expressions for the angular frequency w(k) at the points a, b, c and d shown on the plot 2) Calculate the ratio of u/v at each of the points. Note that u and v correspond to the magnitudes of the displacements for the masses m1 and m2, respectively, used to calculate the dispersion relation at the right. What do the ratios physically imply? 3) What...
1) Sketch a graph that describes the relation between the field current and the terminal voltage of a 2) Sketch a graph that describes the relation between the terminal voltage and the load current of a 3) Sketch a graph that describes the relation between the terminal voltage and the speed of an induction synchronous generator. Provide your explanation of the relation. synchronous generator. Provide your explanation of the relation. motor. Provide your explanation of the relation
Consider the phonon dispersion relation for a 10cm long GaAs crystal, shown in the figure below. (a) How can you obtain the phonon speed from the dispersion relation? What is the speed of the phonons with the shortest wavelength? (2 marks) (b) Which is more effective at carrying energy across a solid: long wavelength or short wave- length phonons? Why? (2 marks) (c) What is the wavelength of the fundamental mode of this crystal? (1 mark) (d) In the long...
for eqn 1+ K/(s^2(s+1)(s+5)) =0 a) draw real axis of root locus b) sketch asymptote for k to infinity c) sketch locus
final answers using a complete sentence. All probabilities should be represented as appropriately labelled and shaded graphs. 1. Suppose babies born in a large hospital have a mean weight of 3548 grams and a standard deviation of 313. If 62 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would be greater than 3495 grams? 2. In a survey of 700 community college students, 481 indicated that they have...
Indicate the direction in which the electrons in the valence and conduction band will move in the dispersion relation when an electric field is applied in the [100] direction. The figure below shows the dispersion relation of silicon in the [111] and [100] directions. It also shows the location of the thermally excited electrons (black dots) and holes (circles) at room temperature. 4 Conduction band Si 3 Valence band 0 [100] P Crystal momentum hk 4 Conduction band Si 3...