Homework Statement
0.025kg of steam at a quality of 10% and a pressure of 2 bar is heated in a rigid container until the temperature reaches 200 degrees celcius. find the final quality (x).
Homework Equations
The Attempt at a Solution
ok, so i use the steam tables and find vf and...
Homework Statement
"A polymer, with Young’s modulus 2GPa and yield stress 50MPa, is reinforced by
uniaxially aligned glass fibres which have Young’s modulus 70GPa and fracture at
1400MPa. The volume fraction of fibres is 40%.
(a) Calculate Young’s modulus for the composite in the...
Homework Statement
derive the equation for the bulk modulus, K = E/3(1 - 2v), where v is poisson's ratio.
Homework Equations
E = stress/e, where e is strain
The Attempt at a Solution
e_v = e_x + e_y + e_z
e_y = e_z = -v*e_x
e_v = (1 - 2v)*e_x
K = stress/e_v
therefore K =...
but each mass is connected to 2 springs. therefore each equation should only have 2 terms. the only mistake i can see with the second equation is that Fx2 (force from the THIRD spring) should be negative. oh, and sorry if i haven't been clear enough -- the diagram goes like this:
[wall]...
Homework Statement
2 equal masses are joined together by a spring of stiffness k. each of the masses is then connected to a wall with an identical spring. derive the equations of motion in matrix form. (a diagam has 2 masses with x1 on top of the first mass and x2 on top of the second.)...
Homework Statement
the question can be found here: http://www.mailfreeonline.com/uploader/04AEED12.jpg
i'm having issues with parts (a) and (d). the rest i think I've done correctly, but it would be helpful if someone could verify my answers.
Homework Equations
The Attempt at a...
so B is constant anywhere inside the solenoid? that would make sense because the magnetic field is roughly a straight line when inside the solenoid as I've drawn it, but i still fail to see how the ratio of the length of the solenid and its diameter make a difference. also, is there a difference...
Homework Statement
the question can be found here: http://www.mailfreeonline.com/uploader/CED0D65C.jpg
Homework Equations
ampere's law
The Attempt at a Solution
a.
(is B the magnetic field?)
B = uI/L; u = 4pi x 10^-7, I = 1, L = 2pi x 0.1
so B = 2 x 10^-6
^ can anyone...
Homework Statement
the question can be found here: http://www.mailfreeonline.com/uploader/5731C3EE.jpg
Homework Equations
The Attempt at a Solution
i couldn't do parts a and b.
part c:
i added resistors in parallel and somehow got a value that Vo = 9.33V (part of the circuit...
if you substitute in my (supposedly correct) equations for i1, i2 and i3, you don't reach the conclusion that V1 = V2 = V3...
also, using the window method, I'm sure you can inspect every window individuall. i just don't know how to do it lol.