Recent content by LauraMorrison

Homework Statement [/B] I have a metal disc adhesively bonded at its edges to a piezoelectric ring. The piezoelectric ring vibrates radially which leads to the plate vibrating transversely. I am looking to work out the resonant frequency of the metal disc which I believe will depend on the...

Thanks, really good advice.

Hi there, I am currently trying to work out what force I will need to pull the curtain out and in (in the system shown in the attached illustration) so that I can calculate the torque required to turn the black cylinder component and therefore find out what motor I will need. I am simply...

Hi there, I am struggling to understand how moving the summation (with H3) to before G1 will cause H3 to have to be divided by G1. I tried writing down how the equations would work to make sense of it but I still can't see how it works out. Please can someone explain this to me? Thanks, Laura...

Perfect I understand now! Thank you :biggrin:

What a great explanation. Just one last question about this, when performing the parallel axis theorem on the vertical weld lines (of height d) should I calculate the distance from the bottom of the weld lines to the neutral axis or is it the distance from their centroids to the neutral axis...

Hi there, I am covering a topic on welding at university and I am struggling with deriving the second moment area for the structure attached. The desired second moment of area is also given in the attached image. The first part is particularly confusing to me as I know that the total second...

Thank you very much, great help.

Yes, that is what I thought. The solutions to the question do not agree with this though. I have attached the part of the solution relating to the manometer as the overall question asks to calculate the speed V2. I don't know if this changes anything? I also emailed my lecturer about this...

Homework Statement Can anyone tell me why, in the figure attached, the pressure in the manometer at 1 is a stagnation pressure? I understand that you get stagnation pressure at a stagnation point but point one is below the stagnation point, not on the stagnation point. Therefore how can it be...

Thank you so much! Makes so much more sense :D

This explanation helps me a lot, thank you. It may be a silly question, and I may not need to know the answer, but why do we integrate in the first place? I think I may lack knowledge of the functions of integration.

If rho and V were constant you get mass flow rate = rho x V x A .. which is the equation I use when the velocity is constant to calculate mass flow rate, so that makes sense! What would happen if the control surface was a section of pipe with fluid flowing through it? I don't actually know...

Oh I see, sorry I didn't read that carefully enough. Thank you I get it now! :)

Homework Statement I will honestly be so grateful if someone can explain this to me. I am studying the Reynolds transport theorem, particularly mass conservation. I have read over my notes and I really do not understand how to calculate the mass flow rate through the control surface if it...