Recent content by PaxFinnica96

I am trying to mathematically prove the Static Pressure Head equation: H = p/ρg How can I prove this equation and thus determine the nature of the relationship between these variables?

Hi Chestermiller, I'm not really sure where I was going with this either and as a result I'm quite confused on where to begin. I think I should use: p=1((h1-h4)+(1-0.32)(h4-h2)) to find the power output from the turbine but not sure if I've used the correct equations for (b) and (c).

Hello Physics Forums, I have been struggling with this question for some time now and I'm not sure my method is correct - please see attached. Any help you can give to check I'm on the right lines would be very much appreciated! Cheers, C

Many thanks for your help, I get 0.179 kg

I would very much appreciate anyone to cast their eye over my attempt at solving this problem which I've been struggling with the past few days. Many thanks in advance. Assuming that: energy input from open-type regenerative feed heater pump is negligible no energy is lost the heater pressure...

Cheers, I had a go at it yesterday from what I think is right... Specific heat of steam (@ 5 bar) = 2.32 kJ/kg K Water feed rate = liquid HC at 90deg + Specific heat of steam at 5 bar + enthalpy of vaporisation at 5 bar = 4.2 + 2.32 + 2108 = 2114.52 So... Total Heat In = (2114 x 4.2 x (90 -...

Hi @Bystander I was wondering if you could help me with post No. 12 which I am really struggling with. I've figured out most of the values to calculate feed rate - liquid heat capacity of water is a constant of 4.2 kJ/kg and, latent heat of steam (enthalpy of vaporisation) at 5 bar = 2108 kJ/kg...

Ok, well I believe the bridge is designed to be balanced so that the value of resistance, RS, can be calculated and thus related to the resistance (ant therefore temperature) of the thermometer. It is this value I have used to incorporate into my rearranged resistivity equation to determine the...

Ah ok, but 4.22 x10^-8 m^2 = 0.0422 mm^2 however I cannot see this value of diameter in the SWG table provided - do you think it would be easier to calculate the ohm/m for copper instead or is there another error in my method?

Hi All, Really struggling to get my head around what I'm doing wrong - every time my answer of wire diameter comes out too small for what's included in the table of SWG. I must be doing something wrong somewhere - my attempt is below. Any help is very much appreciated.

Ok, that's great I think I've managed to solve the two equations and demonstrate the proof but I'm still struggling with how best to determine the time constant - would it just be a simple matter of rearranging the model equation (the one I've just solved from the two above equations) for tau?

So instead of differentiating at the end I should just leave the equations as they are like below?

Hi All, I'm really struggling with the below question - I'm not sure if I've taken the correct approach to determining the model as there may be an easier way to do this? Any help in much appreciated, please let me know if I have submitted this template correctly as this if my first time...

Hi Anthony, Did you manage to submit this answer for part a and was it correct? Cheers, PF