Recent content by tanky322

This slapped me in the face about 10 minutes after I posted, made me feel rather dumb... Thanks for your reply!

Homework Statement Solve the Mass-Spring-Damper Differential equation mx''+bx'+kx=exp(-t)cos(t) (Where x'' is d2x/dt2 etc, don't know how to do the dots above :confused:) I understand how to solve this problem, but the thing that confuses me is that the right is in terms of "t"...

I think there is a unit issue with the specific heat of 3850 J/(Kg K), given that the specific heat of water is around 2200 KJ/(Kg K). I just wanted to see if what I am saying here is making sense. Thanks

Thank you!

Im looking for thermodynamic properties of seawater, especially specific heat and enthalpy. I am designing a solar desalinator, and I am trying to determine the required amounts of energy to evaporate the water. Is there a way in which I can determine the enthalpy of seawater by knowing the...

We have covered the basic modes of heat conduction, Conduction, convection, radiation etc, also we did a good deal on heat exchanger design. I would say pretty much the basics of heat transfer. Equipment wise I have access to a variety of equipment. CNC mills and lathes and various different...

After really thinking about this, I never put two and two together that I could just use the saturated steam tables. Does anyone have any useful ideas that I could use as a design project? The only requirement is that it cannot be purely theoretical, some type of model must be built...

I'm starting a Thermal Design course this semester and I need to come up with some type of thermal based design project. I came up with one idea, but I am trying to determine its feasibility, which is not proving to be very easy. I have been trying to find the correlation between pressure...

I'm somewhat familiar with complex variables, although not too much. I guess what I am not really sure of, is what exactly converges? The function and e^-st? Thanks for your reply!

Can anyone explain the region of convergence to me in english? I understand the Laplace transform and can do it with my eyes closed, but I can't figure out how to figure out the ROC. I've scoured the internet, and every definition is vague or just incomprehensible by me. Thanks!

Hi mapes, thanks for responding. I ended up figuring it out I think. This is what I ended up putting in my report for an answer. I got it from a DOE paper http://www1.eere.energy.gov/industry/imf/pdfs/intermetallics.pdf" The brittle nature of the Al-Cu alloy can be attributed to the fact...

Homework Statement Examine the ductility of the Al-Cu alloy. Note how brittle the mixture is- most unlike copper or aluminum-Why? 2. Relevant Information The alloy was a 50-50 mix of Al and Cu heated to 700C and then poured into a mold, before the eutectic temp was reached the...

Quick question on 3 phase before my final! Homework Statement In equations for 3 phase power there is an angle that is mentioned, but I don't know if this is the angle of the impedance or another angle. I am a little confused. The equations are below. Homework Equations...

I came across a circuit online to vary the 220V input into a welder. This is done to control the amount of current entering the piece being welded, using a foot pedal. The circuit has worked for many people. I built the circuit, but it doesn't work. R2 blew when I would crank the pot up, and...

Woops! yes there is another 9V source in series with R5, below it.