How Does Wave Frequency Affect Speed in the Same Medium?

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Wave speed in a given medium is determined solely by the properties of that medium, not by the frequency or wavelength of the waves. In this case, the wave speed of the first source can be calculated using its frequency and wavelength, which is 150 m/s. Since both sources emit waves in the same medium, the speed of the waves from the second source is also 150 m/s, despite its higher frequency. The confusion arises from the lack of a provided wavelength for the second source, but it is not necessary for determining speed in this context. Understanding this principle clarifies that wave speed remains constant in the same medium regardless of frequency.
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I know this is probably really really REALLY basic physics, but I'm not too good with it. (still doesn't understand why a massage therapist needs physics, but whatever). Unfortunately being a Sunday, and me taking this class through correspondence...my tutor isn't available. And I feel REALLY stupid about this. anywho...here's my problem.

Two Vibrating sources emit waves in the same elastic medium. The first source has a frequency of 25Hz, while the frequency of the second source is 75Hz. Waves from the first source have a wavelength of 6.0m. They reflect from a barrier back into the original medium, with an angle of reflection of 25degrees. Waves from the second source refract into a different medium with an angle of incidence of 35degrees. The speed of the refracted waves is observed to be 95m/s.

What is the speed of the waves from the second source in the original medium? Explain your answer.

Okay, so here's what the problem for me is...The first part of the question (not posted here) was to find the speed of the waves of the first source, no problem there. The thing is, to find the speed of the waves from the second source, they didn't give a wave length. Can someone help me make sense of all this mush? I've been working on it most of the afternoon and my brain's at about melt down point. :confused:
 
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please someone throw me a bone...this problem is really bugging me and grating on my nerves.
 
WELL this is just a LITTLE discouraging, no help from a help board. Cand someone PLEASE try and help me out a little bit here?
 
Are you aware that the wave speed in a given medium depends ONLY on the medium?
That is the wave speed of waves from the second source is the same as the wave speed of the waves from the first source.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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