Recent content by Makveger

Hello, I understand the tangential shear stresses (or forces) acting on a fluid element due to friction between moving fluid layers, but I can't imagine how viscosity might cause a normal force (on a fluid element)...explain please!

Thanks Astronuc , that's what I needed to know :) Morbius Actually I'm not, you see I am a mechanical engineer and I am studying nuclear engineering how is that not knowing more? I was just asking for the guidelines as it's the first time for me to explore such world

I wish I had a professor like you

Thanks guys for your replies but I am kind of confused right now Morbius : daveb : so :biggrin: ? @Moribus : Can you please mention the topics of Modern Physics that is essential for nuclear engineering?

I'm studying Mechanical Engineering (thermo-fluid sciences),and these days I'm reading a book about Nuclear Engineering and it seems very interesting except for some parts that are giving me headaches. the second chapter is about some modern physics concepts which I am really having some...

1 - What is Wavefunction Ψ? In the derivation of the equation we treated the total energy of the electron or the particle as the kinetic energy of the particle and the potential energy 2 - Can you give an example of the potential energy of the electron?(Is it like the electric field applied...

First check out this picture (from the book I'm reading) http://imageshack.us/photo/my-images/838/25090635.png/ It says that the collector's voltage is decreasing , can you explain why? also it says "few photoelectrons can overcome this potential difference", since the potential...

Hello I'm new to Nuclear Physics and I'm stuck in understanding the Isotopic Abundance the book I am reading says this : "The isotopic abundance of the i-th isotope in a given element is the fraction of the atoms in the element that are that isotope." can you explain this please?or just...

Solving PDEs using Fouries Series ? Hello I am trying to solve 2D Laplace's equation (\nabla2u) using Fourier series using these boundary conditions for a square domain of length L: u(x, 0) = 0 u(0, y) = 0 u(L, y) = 0 u(x,L) = Uo After solving the 2 ODEs(separating variables method)...

I'm a mechanical engineering student in my senior year These days I find my self very interested in thermal radiation and radiation in general like gamma rays,I've never been able to get deep into this field just a little bit in the heat transfer course So is there any way to get deeper in...

I think I find AlephZero correct @carnocs3m5 : I Suggested you before to use something relatively bigger in dimensions than the sphere 2.5 cm & 2 cm are pretty much close don't you think :rolleyes:?? may be you can use a tub(for water of course) and for the other fluids you can use a...

So is this the exhaust velocity?? If so , then the relative exit velocity of the air will be = 100+120 = 220 m/s From conservation of momentum equation : F = (m dot * v)e - (m dot *v)i = 1000 * (220 - 100) = 1000 * 120 = 120000 N = 120 kN I'm not so sure about that Pe&P0 are the pressure of...

That's correct as Fb = (4/3)\Pi*R3*\rho(fluid)*g by rearranging the equation Fb + Fd = mg , you will get the difference in density.

No worries so is everything cool now :))??

Why do you want to make it hard for yourself?? As I told you,use the formula I gave you (which is also in that Wikipedia page) which give you the Dynamic Viscosity In the SI system the dynamic viscosity units are N s/m2, Pa s or kg/m.s and for the dimensions: Density : kg/m3 Gravity : m/s2...