Homework Statement
I am trying to find the current across Rg. I do not understand the answer provided
Homework Equations
The Attempt at a Solution
Am I supposed to add the two voltage sources and then continue?
Homework Statement
I found the values ##F_{3\rightarrow(1+2)}=0.32## and ##F_{1\rightarrow3}=0.25##
I now want to find ##F_{2\rightarrow3}##
Homework Equations
Reciprocity relation
##A_iF_{i\rightarrow j}=A_jF_{j\rightarrow i}##
The Attempt at a Solution
Using the reciprocity relation to find...
Homework Statement
I am trying to find the peak time and %OS from the diagram
Homework Equations
The Attempt at a Solution
I know how to get the %OS but for the peak time, isn't it just the time of the first peak, so around 1.1s? But the answer I am supposed to be getting is 0.0922s
Homework Statement
http://postimg.org/image/5o9kcuj57/
I do not understand what the vectors W and V represent
Homework Equations
The Attempt at a Solution
I know U is the tip speed velocity but I don't know about the other two
thanks. Also, for the first diagram,on the very first run of the loop, is the signal exiting the (2s+1)/s block the same after it passes through the summing junction?
Homework Statement
I am trying to understand the simplification between these two block diagrams
Homework Equations
The Attempt at a Solution
I understand the 2s+1/s has been moved past the summing junction, resulting in the 2s.
But I dont understand where the s/2s+1 block comes from
Homework Statement
http://postimg.org/image/uc0c581cb/
For (b), how many points of linearly independent motion are present in this system?
Homework Equations
The Attempt at a Solution
The solution says there is rotation of J1, between K1 and D1, to the right of K2 and finally J3
But isn't...
Topics covered include links, mechanisms, Kinematics of rigid bodies : Relative Velocity and Acceleration method, Instantaneous Centre Method, Dynamics of Rigid Links, Gears, Cams etc
I cuurently have this book ...
Homework Statement
Attached image
Homework Equations
The Attempt at a Solution
The book says that the force P causes a torque about the x axis. Why is it not a moment about x?
Why is it specifically a torque in this case?
Homework Statement
http://postimg.org/image/9va37id55/
The question is to find the shear stress at the points A, B and C. The solution uses the sectioning planes aa, bb and cc to do so.
For example, at C, how should I know whether to use a horizontal or vertical sectioning plane. Also, how...
Homework Statement
This is a diagram T-v diagram for a closed system consisting of a sample of moist air that is cooled at constant pressure
can someone explain what happens for the state of the water vapor to move from d to 2? if its cooling at constant pressure, why does it not stay on the...
Homework Statement
How do I set up a matrix to find the combination of ( M(L^2)/T ) and I ( L^4)
that results in units of M/ ( L^2 T^2 ) ?
Homework Equations
The Attempt at a Solution
I think it looks something like
[ 1 0
2 4
-2 0 ]
*
[ a1, a2, a3]
=
[1 -2 -2]
but the dimensions of...
Homework Statement
http://postimg.org/image/4a8sv6umh/
Why do the pressure forces due to p1 and p2 act in the same direction?
Homework Equations
The Attempt at a Solution
I thought that, given the direction of the flow, the pressure force on the bottom and top would act in opposite directions
thanks, I finally understand that
I still don't understand this part
How does the 4cm take into account the other stream; the second "mass flow rate* V *cos(theta/2)" term
Homework Statement
http://postimg.org/image/i4p19540z/
Homework Equations
Resultant force on the control volume = Mass flow rate (Velocity outlets -Velocity inlets)
The Attempt at a Solution
I am just wondering if the 4cm is called depth, then what is the term for the "into the paper"...
Homework Statement
I'm trying to find some information on "How does the dew point control the exhaust temperature of a thermodynamic cycle?"
Homework Equations
"The dew point is the temperature at which the water vapor in a sample of air at constant barometric pressure condenses into liquid...
Homework Statement
can someone explain why we are interested in forming dimensionless products
and why only n-j of them should be formed from the problem's variables?
Homework Equations
Step 1: List the variables in the problem
Step 2: Express each of the variables in terms of basic...
Homework Statement
I'm given a system of equations and I'm told to:
Solve this system by hand in 4-decimal digit arithmetic with rounding, using Gaussian elimination without
pivoting and backward substitution
Homework Equations
The Attempt at a Solution
When they say 'without backward...
I read the slides but I'm still confused about this kind of distributed load
http://postimg.org/image/xic825v3j/ [Broken]
could you explain the contribution of each term?
Homework Statement
http://postimg.org/image/4fhu5k9r9/ [Broken]
Can someone explain what is meant by 'missing water' in this solution diagram
The original question diagram had no such water above the gate AB
Homework Equations
The Attempt at a Solution
Homework Statement
could someone explain why the terms in red represent the red distributed load in the attached diagram?
Homework Equations
http://postimg.org/image/3x0wywr4v/ [Broken]
The Attempt at a Solution
the only term I think I understand is the -3<x-0>^0 but I'm not sure of the rest
thanks, I have another question:
at x=6, I'm supposed to be getting V(x)=0 but summing the dotted curves, I get
(23/4) -3(6) +3(3) + (1/6)(6^2) - (1/6)(3^2) + 2(3) + (7/4)
=9
Homework Statement
Can someone explain how the expression for V(x) is plotted?
Homework Equations
The Attempt at a Solution
I understand the plots for the dotted lines but not how they got the actual plot for V(x)
Homework Statement
http://postimg.org/image/lgphyvggz/
Homework Equations
The Attempt at a Solution
can someone explain where that transpose came from in (3.3)?