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...
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...
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
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...
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?