Recent content by SuperCass

Yes! I think I got it! I did the frequency from a times 2 times the length of the string to get the velocity. Then I plugged it into the equation v=sqrt(T/mu)! Thanks!

Yes I did get that answer. Oh, so for the string it's f=nv/2L, correct? But when I plug this value into the same equation as above, it doesn't work.

((length of string)/.25)*(Answer from part a) = v.

The frequencies are the same, right? Since the problem says, "By resonance, it sets the air column in the tube oscillating at the column's fundamental frequency"? So for v I get .027288 m/s. When I try plugging it into the equation v=sqrt(T/(M/L)), I get an incredibly small number (1.89e-5)...

Oh okay. So I see that it goes at it's fundamental frequency. Do we use L=.25(lambda)? (We use the L from the string right? Or the tube?) How do we get the velocity from that??

It's the string's...? So I'd use v=343m/s. But when I solve using the string's mass divided by the string's length, it doesn't work.

Oh I see! I put in the wrong length. So I did speed of sound divided by 4, divided by the length of the tube. Now for part b I know the equation v=sqrt(T/mu). I've always struggled with solving for mu. Is it M/L? Of what?

Homework Statement A brass tube of mass 23 kg and length 1.5 m is closed at one end. A wire of mass 9.9 g and length 0.39 meters is stretched near the open end of the tube. When the wire is plucked, it oscillates at its fundamental frequency. By resonance, it sets the air column in the tube...

Got it! Thank you so so much!

Okay so what I have done so far is found the path length difference, (\DeltaL = L1 - L2). I know that \DeltaL/\lambda = \Phi / 2\Pi, but is this the right direction? Where do I go from here?

When there is no phase difference or the phase difference is divisible by pi?

Interference -- Frequency Homework Statement Two loudspeakers at an outdoor rock concert are located 3.5 meters apart. You are standing 16.1 meters from one of the speakers and 19 from the other. During a sound check, the technician sends the exact same frequency to both speakers while you...

Thanks again for your help. I just can't figure this out!

Oh I see! Forgot I could solve for that! Okay so I have the length. I solved for the torque (hopefully correctly) by doing the weight of the mass times that length. For the moment of inertia, would it just be for a point mass MR^2? When I solve it this way, my acceleration just comes out as...

Got part a! Thanks, I didn't know that equation! so t=14.3956s. For part b, how would I solve for those oscillations? I think I'm supposed to find the period and divide the time found in a by that, but does the period change if it's damped? Or am I just wrong here? Thanks again!