1) What occurs when a pulse reaches a boundary between 2 different media?
2) Given: Velocity= 5×10^4 m/s, wavelength of 2.5×10 m. What is frequency?
3) What type of wave is sound traveling in water?
4) Given: the elapsed time between successive crest of a transverse wave passing a given point is 0.08 second. What is the period of the wave?
5) Given: Sound wave, time= 0.4 second, frequency= 370 hertz. how many complete waves are produced in that time period?
2007-02-07 08:36:03 · 1 answers · asked by myfriend 1 in Education & Reference ➔ Homework Help
1.) When a wave reaches a boundary between 2 media, it either reflects or refracts. Example: if you yell at someone underwater, some of the sound is reflected, and some is refracted, which is why the sound is muffled and seems to come from a slightly wrong direction.
2.) λ = v/f
f = v/λ = 5×10^4 / 2.5×10 = 2×10^3 Hz.
3.) Travelling or Progressive wave, because it travels.
4.) The period is the time for one complete cycle. Since each crest arrives at .08 seconds, then that's the period.
5.) Frequency is the # of cycles/second. Thus, frequency * time = # of cycles.
370 * .4 = 148 waves.
2007-02-09 00:05:33 · answer #1 · answered by ³√carthagebrujah 6 · 0⤊ 0⤋