1. H

    Fault tree analysis

    In pressurised tank example of fault tree analysis how do you calculate the unavailabilty of components if you haven’t got repair factor . Problem is attached.
  2. S

    Op Amp circuit and RC circuit transient analysis.

    I have unable to figure out this 2 problem. Please help me understand them. For the first one #1, (Op Amp), I know that all ideal opAmp has V+ = V- but the problem states that Vout = A ( V+ - V-). If there were equal, Vout will be 0 then. For the second one #2 ( I am really have a hard...
  3. B

    Static Force Analysis

    Hi! I'm trying to complete a static force analysis on the bar linkage shown below. The goal is to find the payload mass in terms of the cylinder forces and everything else in a static environment. To simplify things I've made the assumption that the mass of the payload in the bucket...
  4. A

    Could anyone please help me with dimensional analysis equation no. 2b is used to calculate acceleration of particles. I am trying to solve it in hypothetical situation and want to know if following...
  5. F

    Thermal Diffusivity via Laser Flash Analysis on Carbon Fibre & Copper

    Hi Guys, Through the LFA I have measured the thermal diffusivity of a carbon fibre epoxy resin sample with a copper pin inserted through the thickness (attached a picture). The copper pin takes the 0.1% of the volume. Knowing the thermal diffusivity of the copper and the thermal diffusivity...
  6. K

    heat exchanger exergy analysis

    i am having a problem with heat exchanger (tube and fin) exergy analysis... the problem which i am having looks like this: in one of the cases air (mass flow of air: m,a=0,71 kg/s) is entering the heat exchanger with temperature T,aIN=21C and relative humidity RH,aIN=57%, air is cooled to...
  7. N

    Mesh Analysis Questions (Urgent)

    I am unable use kvl for the fixed current source plz help me with these questions.
  8. O

    Deriving the equation of points for exact fitting and shape analysis

    Hello, I would like to ask you some questions. 1) I've a closed curve (for example an ellipse, which may represent the contour of an object) represented by the set of its (known) points. I need to find the equation of that curve to pass through all and every point (exact fit). I think that to...
  9. Q

    Circuit Analysis (diode)

    I am using a new textbook that displays circuits in a way I have never seen. Am I percieving this right? Here's how I transformed the circuit in my textbook: Additionally, I understand that i=1mA, however, I cant seem to understand how V=5V. Help?
  10. P

    Relative motion analysis using rotating axes.

    Good day folks, I have a question from my notes that does not make complete sense. See attached. The formula for Vc is Vc = Va + omega + rca + (Vca)xyz. This is fine. The solution jumps straight to showing (Vca)xyz = (Vca cos45i + Vca sin45j). This I do not understand. I have...
  11. A

    Single-node pair analysis

    I'm asked to find the power absorbed by each element in the circuit. Honestly I am not quite sure where to start. I tried summing the currents in a node about the top, middle, and bottom node but I couldn't find a foothold to work this problem out. Any suggestions?
  12. D

    Internal flow system analysis

    Hi guys I am new to this website and I am in really desperate situation.... could anyone help me solve this question; Perform hand calculations to estimate the pressure drop in each element of the system. Assume two injectors are running simultaneously at a steady flow conditions of...
  13. J

    Analysis of Motion (via graphs)

    1. The problem statement, all variables and given/known data 1a) What type of motion does a cart experience by rolling down a ramp? 2a) Compare values of avg velocity and inst. velocity from your data tables. What conclusion can you draw? 2b) Would the same conclusion apply for non-uniform...
  14. T

    error analysis

    the question is: when a body moves with velocity V1 for first half of the journey and V2 for the remaining journey, its average velocity is given by 2/average V = 1/V1 +1/V2. if V1 and V2 are (15 +- 0.5)m/s and (30 +- 0.1)m/s, find the average velocity within error limits.(Thinking)
  15. A

    Help an Australian Engineering Student Pass His Numerical Analysis I exam!

    Hey all, I've run into a bit of trouble regarding State vectors and expressing equivalent first order equations. We have a useless lecturer who spent all of five seconds on the topic yet it seems to be a frequent exam question. Judging by the point allocation to the question it's probably not...
  16. G

    phase plane analysis

    Hello All. I am wondering if anyone could give me some tips on this problem. I have worked out some solutions, but a few parts I am unsure about. This problem has 5 parts, so please do not be put off. It is essentially one problem. Suppose we have the motion of a mass m described by...
  17. A

    Vector Analysis

    The interaction energy between two dipoles of moments \vec{\mu}_1 and \vec{\mu}_2 may be written in vector form: V = -\frac{\vec{\mu}_1\cdot\vec{\mu}_2}{r^3} + \frac{3(\vec{\mu}_1\cdot\vec{r})(\vec{\mu}_2\cdot\vec{r})}{r^5} and in the scalar form: V =...
  18. R

    [SOLVED] Error analysis, how to set up problem

    \frac {\sigma_z}{z} = \frac {\sigma_x}{x} + \frac {\sigma_y}{y} For z=x+y where x=30cm +/- 5cm and y=40cm +/- 8cm I don't understand what to do here. How does this get set up? How do I do the z, x, and y parts? Do I need to do it 2x, once for + and another for -?