1.The displacement of a wave traveling in the negative directions is given by D(x,t) =5.2cm sin(5.5x + 72t), x is in meters and t is in seconds. Determine
(a) Amplitude
(B) Displacement at (x=wavelength , t= T)
2. The sound intensity from a jack hammer breaking concrete is 2W/m^2 at a distance of 2m from the point of impact. what is the sound intensity for a person watching from 50m away?
3. As light with a frequency of 4.286 x 10^14 Hz passes from air into a diamond, its speed v is 0.413 time in air is the same as the speed in vacuum which c= 3.0 x10^8.
(a) Calculate the value of wavelenghth of the light in air
(b) calculate the index of refraction "n" of diamond
(c) Calucluate the wavelenght in diamond.
(d) What is the valuve of frequency "f" of light in diamond.
(e) Draw the wave in diamond.