- #1
mr_coffee
- 1,629
- 1
Hello everyone! I'm having troubles understanding why I'm not getting this right...the problem is:
A sinusoidal wave is traveling on a string with speed 10. cm/s. The displacement of the particles of the string at x = 25 cm is found to vary with time according to the equation y = (5.0 cm) sin[10.0 - (4.0 s-1)t]. The linear density of the string is 3.0 g/cm.
What is the frequency of the wave?
Well wouldn't just be 4.0 s^-1?
Also it says What is the wavelength of the wave?
I t hought it would be:
You know the wave number is: (5.0 cm) and you know the relationship:
Wave Length = 2PI/k, where k is the wave number: so i put:
Wave Length = 2PI/5 = 1.2566 which was wrong any ideas why I'm not getting these right?
THanks!
A sinusoidal wave is traveling on a string with speed 10. cm/s. The displacement of the particles of the string at x = 25 cm is found to vary with time according to the equation y = (5.0 cm) sin[10.0 - (4.0 s-1)t]. The linear density of the string is 3.0 g/cm.
What is the frequency of the wave?
Well wouldn't just be 4.0 s^-1?
Also it says What is the wavelength of the wave?
I t hought it would be:
You know the wave number is: (5.0 cm) and you know the relationship:
Wave Length = 2PI/k, where k is the wave number: so i put:
Wave Length = 2PI/5 = 1.2566 which was wrong any ideas why I'm not getting these right?
THanks!