Recent content by Marchese_alex

Im confused with the sign convention... From my notes I have that for mass flow rate: Entering is -m and leaving is +m momentum : Entering (-m)(+v) and leaving is (+m)(-v) Example: for a rectangular control volume, let's say, left side is point 1 and right side is poinit 2...

Please help me out. Thanks

Instructions: http://i174.photobucket.com/albums/w105/marchese_alexander/IMG_20130217_200205_zps8261d420.jpg My calculation(justo fallow the steps): http://i174.photobucket.com/albums/w105/marchese_alexander/IMG_20130217_200219_zpsa98cd8c2.jpg

Like the tittle says.. I am practicing and wanted to make sufre I did it correctly. Forma this excersice the only doubt es en the las parte ( parte 5)... I am not sufre but i think I need to use .005 rather than .05

I was looking up info on this topic and came up with this article (http://eng.sut.ac.th/metal/images/stories/pdf/Lab_7Bend_Eng.pdf)... what I don't get is why it says that bending test for ductile materials isn't good. "The stress is essentially zero at the neutral axis N-N. Stresses in...

Also for the datum... I know i can put it anywere but try to put it _____________.

Can anyone give me some advice on where I should take my points of reference when using bernulli equation. I know the point will vary according to the problem, but can one say, always begin looking for this and that and apply the equation... Then move to this and that, etc

nevermind, got it

ok, it is solved by interpolating but I don't know how to do that, to be more precise I have no clue how to interpolate

Sorry for the inverted picture... "y" axis: top to bottom is 500 400 250 "x" axis: at B is .00125 at E is .05 modulus elasticity is E=200GPa so from AB=.00125 from CD=.002 calculated: epsilon=400x10^6/200x10^9 I need to find permanent offset(AC) and I don't know How to find the...

why when calculating sum Mx=0 isn't (60)(.4)(.2)? isn't moment=force time the distance to where the moment is being taken?

ooohh... so if it said only 12 kg, then I would only use mg?

Ok, so the formula I know to find weight is W=mg. Why is it that when doing a sum of forces in z they multiply (distance)(mass)(gravity) and not simply sum the gravity force that is mg?

how do I get an hypotenuse of 5 from square root of 1.5^2+2^2?

no...