Recent content by yopy

with a 5% impedance, Vdrop=%Z(Vp) Ploss=Vdrop(I)this is my methodology behind it, using the Iload of the circuit.

load is approximately 3.84 kW. Its in an office building so the pf is most likely very near 1. I'm trying to figure an efficiency % or power loss to include in an energy audit type write up dealing with savings to be had if the transformer was removed from the system. its technically a step down...

I am currently trying to figure out how much power loss there is with a small transformer we have running VERY hot. XF info: 5kVA 120/208 to 277V %Z:5% I can't recall any power equations dealing with real transformers.

Thank you, I was also wondering the same thing.

The question reads exactly as follows, Find the appropriate values for #'s. a) P(Z<#)=.9 b) P(|Z|<#)=.9 We are currently going over distributions, poissons, density functions and binomial stuff, someone referenced to Z-values from a ztable but i don't know if this is what the topic...

my problem is the one shown above. In all honesty i do not know how this system works since a pulley with two radii's has two different cables running through it. Does anyone know where i need to start at with this problem?

I have an internship interview tomorrow with a company. I'm in construction engineering which is basically construction management. I've never had a real job interview before so I'm not sure what to expect, does anyone know some typical questions that may be asked? I've done some research and...

okay i did FBD, i have 3 forces, one acting on the string to the left, one acting on the string to the right and the weight in Y direction negative. i called the angles to the left and right FetaA and B sum Fx = 0 = -Tcos(fetaA)+Tcos(fetaB) sum Fy = 0 = -w + TsinFetaA +tcosfetaB from Fx i...

i worked through this above statement and found that both angles to the left and right of the weight, from the x-axis to the line, is 30 degrees. I am pretty sure i calculated it right but it seemed to be a lot of work for the problem. but from 30 degrees i can't think of anywhere to go from...

250(9.81) was not my final answer but the calculated value i got for T(tension) in the wire. from there i do not know where to go. i tried doing sum of forces in x and y coordinates but my 2 unknowns were fetaA and fetaB which were the angles from the x-axis to the cord. when i worked it out...

Okay, i posted a picture of the problem above, sorry if blurry, do not have scanner. i will retype problem, The mass of block A is 250 kg. Block A is supported by a small wheel that is free to roll on the continuous cable between supports B and C the length of the cable is 42 m. Determine the...

thank you

i calculated the variance of a few measurements and i got the value of 3.65 i know the variance tells us the degree of dispersion from them ean value, and i came up with 3.65, what does this number say about the data?

Heres the situation, I have a triangle in which i found all 3 interior angles. I also have the length of all the sides and the coordinates of 2 points. I just need to find the coordinates of the 3rd point I am missing. Is there some formula i need to use for this?

i figured it out, the bounds turn into 0 to x^2 for respect to Y, and then 0 to 1 for respect to X my problem was drawing the region they were integrating over. I got the right answer though, thanks.