The air in the bottle was removed by squeezing the bottle until essentially flat then placing a cap on the bottle that has a one way valve. The valve is a ball lock mechanism that is used to pressurize kegs. For the legend I just tried to highlight what were calculated values to help avoid...
TL;DR Summary: I measured the mass of CO2. Can someone verify my calculations?
I took a soda bottle and filled it with Carbon Dioxide then weighted its mass as I changed pressures. My figures get very close (5-10%) within the calculated values for psig but not psi-absolute. Can someone confirm...
How does one determine which direction a sagnac interferometer is turning in a fiber optic gyro? ("FOG")
I have been reading about them and found some DIY examples where the output is taken using a photo-diode. Now my understanding is that these photo-diodes are simply measuring intensity but...
How do I setup an integral to integrate over the following equation:
V(t) = 1/(R*C) integral to t Vin(t) dt
This is the capacitor voltage over time formula.
I want to integrate over a sine wave from 9 to 81 degrees. Frequency of 120Hz, amplitude of 120V.
The formula I used in wolframalpha is...
Svein,
I would like to say thank you so very much for pointing this out to me. I believe you truly made my evening.
I indeed performed the calculations and get -468/-52 = 9.
Can you cite the rule or fundamental misunderstanding that I have missed? I was under the impression that we can...
I'm given the problem 14x+5y=31, 2x-3y=-29
This is a set of linear equations that I am asked to solve. That being said I am getting hung up on how to distribute a fraction. The answer is x=9, however, I am getting x=36 and the step I do not understand is distributing the fraction.
We then get...
Okay, this makes perfect sense now.
So in very simple terms the middle joint has forces that cancel out, hence the Fy in opposite directions because it does not move. It is supporting forces in both directions and therefore must sum to 0 net force.
Thank you!
On EngineersEdge.com they have a free body diagram of a scissor lift
https://www.engineersedge.com/mechanics_machines/scissor-lift.htm
Can anyone explain how the Fy, Fx components are determined? What is specifically confusing to me is how Fy is opposite in direction given the system.
To me...
A voltage follower is used to buffer the signal. It is helpful for changing impedance, too.
For example if you have a high impedance source that you cannot load, maybe a crystal oscillator, you can use the voltage follower to then distribute the signal to multiple loads, or maybe an amplifier...
I noticed that my windshield washer fluid has methanol in it to reduce the temperature of which it freezes. I know it freezes at approximately -28°C which gives us a concentration of MeOH at approximately ~30% by weight.
However, when I try to calculate the required methanol using the mSolute...
I wasn't quite sure which section to post this in but engineering was the closest to my application, although this could be a basic physics question. I'm not sure.
I want to learn how to design a counterbalance such as that in an engine crankshaft. This mechanism has been of interest to me...
I'm working out an impedance matching problem from a textbook (it is not part of any coursework) and I am trying to figure out how they get the 315 term in the polar coordinates below.
Z = (XC*RL)/(XC+RL)
= (-j333*(1000))/(-j333+1000)
= 315 , -71.58*
= 100 -j300 ohms
I calculated that...
From my understanding the excitation of plasma has different mechanisms for DC breakdown vs RF. I believe the RF is a means of magnetic excitation whereas the DC breaks off an electron or something like that. I can't remember off the top of my head.
I have done the DC method and I believe I...
I've searched high and low for data regarding this from scientific papers to books and I cannot find anything in regards to the approximate impedance to excite a vacuum vessel to plasma state.
In particular I want to built a RF Plasma cleaning chamber, however, I am not sure how to design the...
I have answered my own question after further research. Removing the resistors gives an ideal op amp infinite voltage gain operating "Open Loop".
The LM358 for example has approximately 100dB of gain which is 10^5*(V2-V1) since the op-amp responds only to the difference signal (V2-V1) where V2...