Recent content by jahlin

Hello, I am trying to measure the sound pressure inside a cabin. I placed 2 microphones to measure it using octave band. For each frequency i have two sound pressures ..is it possible to take the average of them ? for example add the 2 sound pressure for the 2 microphones and divide...

Homework Statement If stress is given by equation 1 which implies that stress is independent of material and the 2nd equation implies it depends on the material. Inst it a contradiction? Homework Equations Normal stress is given by \sigma=f/A (1) and \sigma=E\epsilon (2) The...

if the setup sounds good then i will manage to get the right answer by myself. Thanks

Homework Statement Compute the double integral where the region is a triangle with vertices (1,1),(2,4),(5,2).(please see the attachment) Homework Equations double integral((16-2x-3y)1/11)da The Attempt at a Solution first i found the equation of the three lines ...

well it doesn't intercept with the y-axis so i assumed it to be zero..

Homework Statement whats the equation of a straight line passing through (1,4) and (5,1)? Homework Equations y=mx+c The Attempt at a Solution i found the equation to be y=-(3/4)x is it right? Thanks

I was confusing the dimensions of an object with the graph. I understood it now. Thanks HallsofIvy and playaone1 for clarifying.

as you said every point on the X-Y plane is mapped to the "surface" by a translation along the Z-axis. what abt the graph of 3d every point is mapped to a surface by a translation along what axis?

the graph of function of 3 variables f(x,y,z) is a surface with thickness?

Homework Statement heat equation of for 2 dimensional body(stationary)...heat is supplied to a body per unit volume and per unit time and by using conservation of energy principle the following equation is derived.. \intQt dA= \intqt d\ell the intergral on the right is a line integral on a...

if a function is definied by z=f(x,y)..the graph of the function is a surface without thickness right ?i can't really differentiate between a 3d and 2d graph..both look like surfaces.

Homework Statement for \varphi(x,y)=2x+y+10 ,calculate the flux line integral...on a straight line from A(1,4) to B(5,1). Homework Equations The Attempt at a Solution I tried to solve it but didnt get the right answer. first i found the quation of the line which i found to be...

Homework Statement The problem requires to determine which of the 2 bars has zero axial forces without any computation. Homework Equations The Attempt at a Solution I can't tell which bar has zero axial forces.

what i fail to figure out is (1/G2) + 1 where this +1 comes from. thanks for your help.

heres the block diagram which i refer to in my original post. the above attachment is the 1st step in reducing this block diagram.