Recent content by JJ420

First off I would like to say that this is not a homework question. I am trying to calculate the temperature of a very thin piece of steel. Assumptions The underside of the metal is perfectly insulated To = 20C (initial temperature of material) Q"=3000W/m^2 (heat flux) K = 51.9W/m*K...

so the work done from a to d is W = deltaP * deltaV very good, P is no longer constant so integrate that as well as if it was that simple

could anyone help him?I'm kinda interested in the answer to this as well!

for the first part of your problem draw a freebody diagram...hint-you should have 2 forces on it(Wieght and Normal) for the second part of your problem use F= (SpecificWieght)*(DepthToCentroid)*(Area) then you will have to find where the force is acting on the wall Depth=...

mechanical motion enables electric energy to arc and ignite gas the combustion would be chemical energy released to create thermal energy

i think it looks good...but i am always wrong about these things...can someone else see if this is correct or not

work=pressure x volume i believe work = pressure * velocity are u sure u need to find the time

thanx to everyone for the help...i'm definately on the right course now...i don't know about DrGame tho

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sorry I'm not sure...u mean i have the derivative of arctan y?? so the correct solution would be arctan y^2 + C??

integrate with a formula?? Homework Statement dy / (1+y^2) Homework Equations The Attempt at a Solution i tried using substitution technique but that did not yield the correct answer... u = 1 + y^2 du = 2ydy is there a formula i should be looking for maybe?? any help or...

the identity is cos^2x = (1 + cos2x)/2 is it not?

what about the horizontal component?

looking back to the origonal i don't see how there is a negative

oops that -13 is supposed to be an exponent of the numerator (-1) and 3 in the denominator