A wave of amplitude 5 m has a frequency of 40 Hz and wavelength 31.4 m. The sine wave equation for this wave is O a. 5 sin (251.2 t- 0.2 x) b. 5 sin (125.6 t- 0.1 x) c. 40 sin (31.4 t - 0.2 x) d. 31.4 sin (314t- 0.157 x)

A tube 1.20 m long is closed at one end. At the open end is a sound wave generator whose frequency can vary from 100 Hz to 900 Hz. The speed of sound is 343 m/s. Considering these conditions, answer the following two questions: I) How many different stationary waves can be produced in the tube? a.    2b.    3c.    4d.    5e.    6f.    7g.    8h.    9i.    10 II) What is the lowest frequency of the stationary waves that can form in the tube? a.    587 Hzb.    462 Hzc.    286 Hzd.    357 Hze.    143 Hzf.    214 Hz

Two traveling plane waves are combined at certain point, if their equations are y1=0.5 sin ( 15 x-4.5t+r/5) m and y2 = 0.3 sin (15 x-4.5t + 3Tt/4)m. Determine the amplitude of the resultant wave. Select one: O a. 0.29 m O b. 0.29 m O c. 0.54 m O d. 0.84 m

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uniform TEM plane wave propagating in a medium has H = -6 e- cos(2n x 10't - Bz) âg + 2e"sin (2m x 10't – Bz)â, A/m. If the medium is characterized by 4=20, e=1, o=3 S/m. a. Is the medium a good or a poor conductor? Determine a and B. b. What is the characteristic impedance, n? c. Determine the E field.

17. A 150 W light bulb emits radiation waves spreading out equally in all directions. What is the intensity of this radiation 2.0 m away? " A. 3.0 W/m^2 B. 4.0 W/m^2 C. 12 W/m^2 D. 24 W/m^2 E. 150 W/m^2

6TT Consider a wave described by the wave function y (x,t)= 0.65m sin (- s-1t +), find the frequency of wave? a. 1.67 Hz O b. 1.33 Hz Oc. 2.22 Hz O d. 0.75 Hz

2. A very narrow slit of width a = 2.50µm is illuminated with light of wavelength 1 = 540.0 nm and a diffraction pattern is observed on a screen D=1.25 m from the slit. At the screen, how far from the optical axis, y2 , is the second minimum that appears on а. either side of the central maximum? b. At the screen, how far from the optical axis, ymax is the furthest minimum that appears on either side of the central maximum?

Order the following waves by their wave vector. Negative wave vectors are less than positive wave vectors. a) y(x, t) = 4 sin(x - t) b) y(x, t) = 4 sin(-x- - t) - c) y(x, t) = 4 sin(2x - 5t) d) y(x, t) = sin(-2x - t) a) > c) > d) > b) d) >b) > c) > a) c) = d) > a) = b) c) > a) > b) > d) A

5 TE Consider a wave described by the wave function y (x,t)30.50m sin 9TT st+ 4. -1 ), find the 10 wavelength of wave? O a. 1.2 m O b. 0.89 m c. 1.12 m O d. 1.35 m DELL